Question

9. Find a and the length all sides.

Answer 1

Answer: A = 8

Explanation:

Since Side BC and AD are equal

then we can plug both equations to each other to find A

6a + 20 = a + 60

solve it

6a + 20 = a + 60

- 20 -20

6a = a + 40

-a -a

5a = 40

a = 8

You can now find the length of all sides :)

Answer 2

a = 8

Bottom and top length are 68

left and right are 28

Explanation:

6a + 20 = a + 60 (same length do to the little tick marks)

5a = 40 (subtract 1a from both sides and 20 from both sides)

a = 8 (Divide)