In a group of 120 band students 30 of them play a woodwind instrument. What percent of the band students do not NOT play a woodwind instrument.

75%

Step-by-step explanation:

We are told that in a group of 120 band students 30 of them play a woodwind instrument. The number of those that don't play woodwind instrument would be:

= 120 - 30 = 90

The percent of the band students that do not not play a woodwind instrument will be:

= 90/120 × 100

= 3/4 × 100

= 75%

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