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Rajan Kumar Pasi 4 years, 6 months ago
{tex}\huge{=>\ 3.14\times \frac{10.5}{2}\times 10}\\ \huge{=>\ \frac{314}{100}\times \frac{105}{200}\times 10}\\ \huge{=>\ 164.85\ \text{cm}^2}\\{/tex}
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Yogita Ingle 4 years, 10 months ago
Relative Density
- The relative density of a substance is the ratio of its density to that of water.
- Relative density is a ratio so it has no unit.
Density = mass/volume
Relative density = density of substance/density of water
Hifazat Ali 4 years, 10 months ago
Posted by Mr Hadi 4 years, 10 months ago
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Yogita Ingle 4 years, 10 months ago
Statement : There is one and only one circle passing through three given noncollinear points.
Given : AB and CD are two equal chords of the circle.
OM and ON are perpendiculars from the centre at the chords AB and CD.
To prove : OM = ON.
Construction : Join OA and OC.
Proof :
In ΔAOM and ΔCON,
OA = OC . (radii of the same circle)
MA = CN . (since OM and ON are perpendicular to the chords and it bisects the chord and AM = MB, CN = ND)
∠OMA = ∠ONC = 90°
ΔAOM ≅ ΔCON (R. H. S)
OM = ON (c. p. c. t.)
Equal chords of a circle are equidistant from the centre.
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Hifazat Ali 4 years, 10 months ago
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Yogita Ingle 4 years, 10 months ago
7246.8 = 7000 + 200 + 40 + 6 + 8/10
= 7 × 103 + 2 × 102 + 4 × 101 + 6 × 100 + 8 × 10-1
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