Y2-y1 / x2-x1
-4 - 13 / -18 - 13
-17 / -31
17 / 31
Answer:
Below in bold
Step.-by-step explanation:
It consists of 5 isosceles triangles of equal sides 4 cm and vertex angles 360 / 5
= 72 degrees.
Area of 1 triangle = 1/2 * 4^2 *sin 72
Area of the whole pentagon = 5 * 1/2 *4^2 * sin 72
= 38.04 cm^2.
Answer: Check the attached
Step-by-step explanation: