Answer:
Yes they are.
They are congruent because they have two equal angles and one equal side
I really don’t know but my guess is 3
Answer:
Step-by-step explanation:
Perimeter of quarter circle = r + r + 

2) d = 2*10 = 20 cm
Perimeter of semicircle = diameter + (1/2) * circumference of circle

3) Perimeter of three-quarter = r + r + (3/4)* circumference of circle

Step-by-step explanation:
The correct answer is 5i