Isosceles Triangle Review

What is the key feature of a Isosceles triangle

• No sides of equal length
• Three sides of equal length
• Two sides of equal length
• One side of equal length

Tags

CCSS.4.G.A.2

Draw and label an Isosceles triangle

Tags

CCSS.2.G.A.1

What is an exterior angle?

• An angle inside the triangle

• An angle outside of the triangle

• An angle in a square

• What's an angle????

What do the black lines on the sides of the triangle mean?

• The sides are different lengths

• They divide the sides in half

• The sides are congruent

• The angles are congruent

Tags

CCSS.8.G.A.2

What does it mean to have congruent sides?

• The angles are very similar

• The sides are really small

• The sides are different

• The sides are the same

Tags

CCSS.8.G.A.2

A triangle's angles add up to...

(a)  

Tags

CCSS.8.G.A.5

What type of Isosceles triangle has one angle greater than 90 degrees

• An obtuse triangle

• An acute triangle

• A right triangle

• An equilateral triangle

Tags

CCSS.4.G.A.2

What does the Isosceles Triangle Theorem tell us?

• The triangle has two congruent sides

• The triangle has no congruent sides

• The triangle has no congruent angles

• The triangle has an acute angle

We can add our ​ (a)   angles to find the measure of the exterior angle.

• remote interior
• remote exterior
• exterior
• obtuse

Tags

CCSS.8.G.A.5

Click on the exterior angle in the triangle.