Question

help me solve this please.

Answer 1

Answer:

4. Area of trapezium = 45cm^2

Height = 5cm

Length of one side = 6cm

Length of other side = let be x

Area of trapezium = 1/2 ×sum of parallel sides×h

45 = 1/2 × ( 6+x) × 5

45 × 2 / 5 = 6 + x

18 = 6 + x

18 - 6 = x

12 = x

So,

Length of other parallel side = 12 cm

5. Area of semicircle =

$\frac{\pi r {}^{2} }{2}$

Radius = 14 cm

So,

$\pi \: = \frac{22}{7}$

22/7 × 14^2

22/7 × 14 × 14 = 616

616 /2 = 308cm^2

And there is a part of semicircle also,,,

So,, 308/2 = 154cm

Total area of given picture = 308 + 154 = 462 cm^2