A carpenter has several boards of equal length. He cuts 3/5 of each board. After cutting the boards, the carpenter notices he has enough pieces left over to make up the same length as 4 of the original boards. How many boards did the carpenter start with?

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

something over 10 so ? /10

step-by-step explanation:

c

step-by-step explanation:

the answer is:

mean: 6

mad: 2.14