NAME THAT Triangle

obtuse

1 obtuse angle

right

1 right angle

isosceles

2 congruent sides

acute

3 acute angles

equiangular

3 congruent angles

equilateral

3 congruent sides

the ones that are equal, plug them in to eachother of find the x, them plug the x into the other expression

CDE triangle is and isoceles triangle with CD congruent to DE. If CD = something DE = somethinggg and CE = somthhhing find x and the measure of each side

its equiangular

a triangle is equilateral if and only if

exterior angle of a triangle

an angle thata is adjacent to the interior angle of the triangle and is formed by extending the side of the triangle

exterior angle theorem

an exterior angle is formed by extending any one side of the triangle

isosoceles triangles theorem

if 2 sides of a triangle are congruent then the angles opposite those sides are congruent if AB congruent to CD then A CONGRUENT C

converse of isosceles triangles theorem

if A CONGRUENT C then AB congruent to CB

60 degrees

if its and equalateral triangle what does each angle equal

pick 2 expressions doesnt. matter because they are all equal and equal them to each other to find the x, then plug the new x with one of them, and that anwer should be the answer to all of them

if triangle jkl is an equilateral triangle, JK= 13x + 5, KL =17x+19 JL = 8x +35

you add up the like terms and you equal it to 180 degrees

if you are given 3 angles in a word problem to find x and the measures of

scalene

no congruent sides

the exterior angle is equal to the sum

of the non adjacent interior angles of a triangle

triangle sum theorem

the sum of the measures of the angles of a triangle equals 180

use the formula ( x-y )2 + (x-y)2 under a square root sign

when you are given the side measures of a triangle how do you find them