When a polygon is regular, that means that all of its sides are the same length and all of its angles are the same. A heptagon has seven sides and you know that all of them measure 3 inches. You can find the perimeter by adding all of the side measures together, so 3 + 3 + 3 + 3 + 3 + 3 + 3, or 3 x 7. So, the perimeter of the heptagon is 21 inches.
78 units squared add together 27.5+12+22+16.5 and you’ll get your answer for triangles it’s 1/2bh and for the rectangles it’s just bh. hope this helped!
Answer:
40-19 = 21
Step-by-step explanation:
I think this is correct dear
Area of smaller frame =1/4×36=9sq.in
side of smaller frame =

side of larger frame
Answer:
Step-by-step explanation:
Given

Required
Make t the subject

Cross Multiply


Collect Like Terms

Factorize:

Make t the subject
