Question

I just need to check my answers!
1. The lengths of the sides of a rhombus and one of its diagonals are each 10m. What is the area of the rhombus?
a. 100√3m²
b. 50√3m²
c. 25√3m²
d. 12.5√3m²
My answer is B.
2. The area of a regular decagon is 50 cm². What is the area of a larger regular decagon with sides four times the sides of the smaller decagon?
a. 200 cm²
b. 500 cm²
c. 800 cm²
d. 2000 cm²
I have A.
Thanks! x

Answer 1

the first one is right. but for Q2, that should be
the larger area = 4^2 * the smaller area = 16 * 50 = 800

Answer 2

Thanks so much!

Answer 3

you're welcome