Answer:
Step-by-step explanation:
It’s d
Because the angles are supplementary, they add to 180 degrees.
I solved this by dividing

which gives me 30 degrees.
multiply 30 by 5 gives you 150.
and 30 + 150 = 180
Answer:
16.125 is the perimeter
Step-by-step explanation:
Multiply 15.375 × 3 because a triangle has three sides and is equilateral.
15.375 × 3 = 16.125
Have a great day!