### LESSON 4-8 PROBLEM SOLVING ISOSCELES AND EQUILATERAL TRIANGLES

Math High school geometry Congruence Working with triangles. Name the parts of. This is one leg. Well, that’s part of angle ABE, but we have to figure out this other part right over here. And then you want to subtract another 6 from , gets us to

And we’ll do it the exact same way we just did that second part of that problem. Now, this angle is one of the base angles for triangle BCD. So what is the measure of angle ABE? So it’s going to be this whole angle, which is what we care about. Well, if we know two of the angles in a triangle, we can always figure out the third angle. You get the measure of angle BCD is equal to– let’s see. The two x’s, when you add them up, you get 2x.

You’ve got x plus x plus 90 is going to be degrees. The vertex angle is the angle formed by the legs. You get x is ssolving to 45 degrees.

Isosceles Triangle A triangle with at least two congruent sides. Now, this angle is one of the base angles for triangle BCD. Example 3 Find the value of JL. So this angle right over here is degrees.

My presentations Profile Feedback Log out. And we get x plus x plus 36 degrees is equal to And we’ll do it the exact same way we just did that second part of that problem.

So it’s going to be this whole angle, which is what we care about. Find angles in fquilateral triangles. And to do that, we can see that we’re actually dealing with an isosceles triangle kind of tipped over to the left. Isosceles Triangles At least two sides are of equal length.

# Isosceles & equilateral triangles problems (video) | Khan Academy

So they haven’t even drawn segment BE here. The congruent sides are called the legs. So first of all, we see that triangle ABC is isosceles. Astronomy Application The length of YX is 20 feet.

So you get 62 plus 62 plus the blue angle, which is the measure of angle BCD, is going to have to be equal to degrees.

## 4-8 Isosceles and Equilateral Triangles Lesson Presentation

trianglse Isosceles and Equilateral Triangles Section Video transcript Let’s do some example problems using our newly acquired knowledge of isosceles and equilateral triangles. So what is the measure of angle ABE? And we are done. So this right over here is 62 degrees. You get the measure of angle ABC is equal to– let’s see.

So you get 56 degrees. And so we have to figure out the measure of angle ABE. And then– I won’t skip steps here.

So it’s an equilateral triangle, which means all of the angles are equal. So you call that an x.

## Isosceles & equilateral triangles problems

Name the parts of. The side opposite the vertex angle is called the base, and the base angles are the two angles that have the base as a side.

So this is going to be 62 degrees, as well. If you subtractyou get 60, and then you have to subtract another 4. You can subtract