Question

FROM THE FIGURE FIND THE VALUE OF A,B,C

a) In a right angled triangle, two acute angles are in the ratio 5:4, Find these angles

b)The perimeter of a square is 200m. What is its area?
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Answer 1

Answer:

a) one angle is 50 and other is 40

b) 2500metre square

Step-by-step explanation:

Answer 2

Answer:

1)

110° + b = 180° (Linear pair)

b = 180° - 110°

b = 70°

Sameway

120° + c = 180° (Linear pair)

c = 180° - 120°

c = 60°

a + b + c = 180°

a + 70° + 60° = 180°

a + 130° = 180°

a = 180° - 130°

a = 50°

Question A

Let common ratio be x

90° + 5x + 4x = 180°

90° + 9x = 180°

9x = 180° - 90°

9x = 90°

x = 90/ 9

x = 10°

5 × 10 = 50° = 5x

4 × 10 = 40° = 4x

Question B

perimeter = 200m

Perimeter = 4 × side

200 = 4 × side

200/4 = side

50m = side

Area = side²

Area = 50²

Area = 2500m²

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