Pls help from number five 5

P = 40 cm

A = 51 cm^2

Step-by-step explanation:

Perimeter: Add the lengths of all sides. The sides whose length are not shown can be calculated by subtraction.

perimeter = 3 cm + 12 cm + 8 cm + 3 cm + (8 cm - 3 cm) + (12 cm - 3 cm) =

= 3 cm + 12 cm + 8 cm + 3 cm + 5 cm + 9 cm

= 40 cm

Area:

You can find the area by calculating the sides of smaller rectangles and adding the areas. You can also calculate the area by thinking of a large rectangle from which a smaller rectangle inside was removed. I'll use the second method.

area of larger rectangle = 12 cm * 8 cm = 96 cm^2

area of removed rectangle = (8 cm - 3 cm) * (12 cm - 3 cm) = 5 cm * 9 cm = 45 cm^2

shaded area = 96 cm^2 - 45 cm^2 = 51 cm^2

the answer is 28

step-by-step explanation:

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc