The isosceles triangle theorem states that if two sides of a triangle are congruent, then the angles those sides are congruent.

The isosceles triangle theorem states that if two sides of a triangle are congruent, then the angles  opposite to those sides are congruent.

Step-by-step explanation:

Isosceles triangle theorem : If two sides of a triangle are congruent , then the angles opposite to these sides are congruent.

Consider an isosceles triangle ABC

Let D is the midpoint of  triangle BC

Then, BD=CD

AD=AD[Reflexive Property ],

AB=AC [Definition of isosceles triangle]

Therefore, by SSS postulate ,

ΔADB≅ΔADC

Since corresponding parts of congruent triangles are congruent,  

∴ ∠B≅∠C   Hence Proved

Therefore, The isosceles triangle theorem states that if two sides of a triangle are congruent, then the angles  opposite to those sides are congruent.

answer: 180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

13.33%

say 50 oranges, then 100 apples

80 are red, 20 are yellow

total fruit = 150

20chances out of 150 for yellow

20/150 = 13.33%