What is the value of x

A. 10

Step-by-step explanation:

Formula for the Pythagorean Theorem: a^2+b^2=c^2

Substitute: 6^2+8^2=c^2

6*6+8*8=c^2

36+64=c^2

100=c^2

Then, find we to the square root in order to isolate c^2.

10=c.

Final answer, A. 10.

the 3rd option is right

step-by-step explanation:

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2