Question

Please help and I will mark you as brainliest!

Answer 1

5x5x3.142=78.55
78.55/2=39.275
answer: 39.275cm squared

Answer 2

Answer:

39.28 cm²

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr² ( r is the radius )

Thus the area of a semicircle is one half the area of the circle

A = $\frac{1}{2}$πr²

The diameter of the circle is 10 cm, thus radius = 0.5 × 10 = 5 cm

A = 0.5 × 3.142 × 5² = 0.5 × 3.142 × 25 ≈ 39.28 cm² ( to 2 dec. places )