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Sakshi Vajrekar 8 years, 6 months ago
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Govind Singh 8 years, 2 months ago
simple interest = principal*rate*time/100
interest of one year = 4600 - 4400 = 200
then, principal = 200*100/R*1
PR = 20000
I = PRT/100
for first two year, I = 20000*2/100
I = 400
principal = amount - interest
principal = 4400 - 400 = 4000
R = I*100/PT
R = 400*100/4000*2
R = 5%
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Amar Kumar 8 years, 6 months ago
Mid point Theorem : The line segment connecting the midpoints of two sides of a triangle is parallel to the third side and is congruent to one half of the third side.
ABC is a triangle P is the midpoint at AB and Q is the midpoint at AC
Given that: AP=PB, AQ=QC.
To prove: PQ || BC and PQ=1/2 BC
Plan: To prove ▲ APQ ≅ ▲ QRC
Proof steps: AQ=QC [midpoint] ∠ APQ = ∠QRC [Corresponding angles for parallel lines cut by an transversal].
∠PBR=∠QRC=∠APQ [Corresponding angles for parallel lines cut by an transversal].
∠RQC=∠PAQ [When 2 pairs of corresponding angles are congruent in a triangle, the third pair is also congruent.]
Therefore , ▲APQ ≅ ▲QRC
so AP=QR=PB and PQ=BR=RC.
Posted by Durgam Arunkumar 8 years, 6 months ago
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Durgam Arunkumar 8 years, 6 months ago
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Aditya Singh Rajput 8 years, 6 months ago
Posted by Shekhar Tiwari 8 years, 6 months ago
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Amar Kumar 8 years, 6 months ago
Conditions of Parallelism:
Two lines in a plane are said to be parallel if they do not intersect, when extended infinitely in both the direction.
The distance between the two lines is the same throughout.
If two straight lines are cut by a transversal, and if
• the pair of corresponding angles is equal, then the two straight lines are parallel to each other.
• the pair of alternate angles is equal, then the two straight lines are parallel to each other.
• the pair of interior angles on the same side of transversal is supplementary, then the two straight lines are parallel.
Posted by Mohit Kumar 8 years, 6 months ago
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Satvik Jain 8 years, 6 months ago
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