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If all the three sides of one triangle are equivalent to the corresponding three sides of the second triangle, then the two triangles are said to be congruent by SSS rule.

In the diagrams below, if AB = RP, BC = PQ and CA = QR, then triangle ABC is congruent to triangle RPQ.

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M K Tobaiy 4 years ago

If three sides of one triangle are equal to the three sides of another triangle,then the two triangle are congruent

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Find the coefficient of x in ax²+bx+c

Posted by Simran Rani 4 years ago

CBSE > Class 09 > Mathematics

5 answers

Manthan Patel 4 years ago

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Tamana Yadav 4 years ago

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Parth Awasthi 4 years ago

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Shrutee Kumari 4 years ago

in ax^2+bx+c ; coefficient of x is b

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Dhanush M 4 years ago

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find four solutions of the equation 2x+3y-12=0

Posted by Bhumi Kumari 4 years ago

CBSE > Class 09 > Mathematics

1 answers

Rohan Sawase 4 years ago

(6,0),(0,4),(3,2),

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∆ PQR is right angled triangle, which is right-angled at P such that ∠Q = 2∠PRQ.(use√3=1.73) If QR = 10 cm, then what is the perimeter of ΔPQR? A)21.45 cm. B)22.5 cm. C)23.65 cm. D)24.5 cm

Posted by Mithilesh Kumar 4 years ago

CBSE > Class 09 > Mathematics

2 answers

Mithilesh Kumar 4 years ago

It is given that, ∠Q = 2∠PRQ. In ΔPQR, ∠PQR + ∠PRQ + ∠RPQ = 180° ⇒ 2∠PRQ + ∠PRQ + 90° = 180° ⇒ 3∠PRQ = 180° − 90° = 90° ⇒ ∠PRQ = 90°/30=30° … (1) ∴ ∠PQR = 2 × 30° = 60° … (2) Now, extending QP to S such that QP = PS, and joining RS. P /|\ / | \ / | \ / | \ / | \ / | \ / | \ / | \ / | 90° \ /______ |__________\ S Q R In ΔRPQ and ΔRPS: RP = RP (Common) ∠RPQ = ∠RPS = 90° PQ = PS (by construction) ∴ ΔRPQ ≅ ΔRPS (by SAS congruence rule) ⇒ RQ = RS and ∠PRQ = ∠PRS (CPCT) Now, ∠SRQ = ∠PRQ + ∠PRS = 2∠PRQ = 2 × 30° = 60° [from (1)] By CPCT, we obtain ∠PQR = ∠PSR ∴ ∠PSR = 60° [from (2)] Therefore, ΔQRS is an equilateral triangle. ⇒ QR = RS = SP = 10 cm ∴ SP = PQ = 10cm/2=5cm On applying Pythagoras theorem to ΔPQR, we obtain RP2 + PQ2 = QR2 ⇒ RP2 + (5 cm)2 = (10 cm)2 ⇒ RP2 + 25 cm2 = 100 cm2 ⇒ RP2 = 75 cm2 ⇒ RP =5√3cm ∴ Perimeter of ΔPQR = RP + PQ + QR =(5√3+5+10)cm = (5 × 1.73 + 15) cm = 23.65 cm Thus, the perimeter of ΔPQR is 23.65 cm. The correct answer is C.

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Neha Gautam 4 years ago

Nahi aata muje

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Ab parallel CD find angle poq angle Apo angle oqd

Posted by Varsha Kanwar 4 years ago

CBSE > Class 09 > Mathematics

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In triangle ABC, angle A - angle B = 33° and angle B - angle C = 18° find is measure of each angle of triangle

Posted by Rishika S 11 4 years ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 4 years ago

Given :

In a triangle ABC :

∠ A - ∠ B = 33

∠ B - ∠ C = 18

We have find values of all angle :

We know sum of all interior angle of triangle is 180 .

∠ A + ∠ B + ∠ C = 180 .. ( ii )

We have :

∠ A - ∠ B = 33

∠ B - ∠ C = 18

Rewrite as :

∠ A = 33 + ∠ B

∠ C = ∠ B - 18

Now putting

33 + ∠ B + ∠ B + ∠ B - 18 = 180

3 ∠ B + 15 = 180

3 ∠ B = 165

∠ B = 55

Putting values of B in :

∠ A - ∠ B = 33

∠ B - ∠ C = 18

∠ A = 88

∠ C = 37 .

Answer:

∠ A = 88

∠ B = 55

∠ C = 37 .

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If any student will select basic Maths then can he take Maths Subject in 11 th &12 th std? What are the limitations for him? Can anybody explain this ?

Posted by Sandeepkumar Jain 4 years ago

CBSE > Class 09 > Mathematics

1 answers

Prince Jain 4 years ago

No if you take basis you are not able to take maths in class 11 as well as in class 12

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How can be find primefactorization of 72, 800, 18

Posted by Anshika Kumari 4 years ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 4 years ago

Prime factorization is the decomposition of a composite number into a product of prime numbers.

Prime factorization of 72: 2³ × 3²

Prime factorization of 800: 2⁵ × 5²

Prime factorization of 18: 2 × 3²

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What are the properties of a 1.trapezium 2.rhombus 3.parallelogram 4. Rectangle and square

Posted by My Cbse Guide ?? 4 years ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 4 years ago

Trapezium:

Like other quadrilaterals, the sum of all the four angles of the trapezium is equal to 360°
A trapezium has two parallel sides and two non-parallel sides
The diagonals of regular trapezium bisect each other
The length of the mid-segment is equal to half the sum of the parallel bases, in a trapezium
Two pairs of adjacent angles of a trapezium formed between the parallel sides and one of the non-parallel side, add up to 180 degrees.

Rhombus:

All sides of the rhombus are equal.
The opposite sides of a rhombus are parallel.
Opposite angles of a rhombus are equal.
In a rhombus, diagonals bisect each other at right angles.
Diagonals bisect the angles of a rhombus.

Parallelogram:

The opposite sides are congruent.
The opposite angles are congruent.
The consecutive angles are supplementary.
If anyone of the angles is a right angle, then all the other angles will be the right angle.
The two diagonals bisect each other.
Each diagonal bisects the parallelogram into two congruent triangles.

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Is standard maths very difficult or average

Posted by Shruti Padhan 4 years ago

CBSE > Class 09 > Mathematics