Question

What is the area of ACDE to the nearest whole number? A. 87 cm2

B. 105 cm2
C. 123 cm2
D. 210 cm2

Answer 1

C. 123 cm2

Explanation:

The figure is presented below as attachment. The area of ACDE is:

`A = (10\,cm)\cdot (21\,cm) - (1)/(2)\cdot (\sqrt{(20\,cm)^(2)-(10\,cm)^(2)} )\cdot (10\,cm)`

`A \approx 123.397\,cm^(2)`

The answer is C.