Geometry: 4.1, 4.2, 5.4

Quiz 12/18/23

A triangle is a polygon with how many sides?

3

Which angles are the original angles when the sides of a polygon are extended?

Interior

When the sides of a polygon are extended what angles form linear pairs with the interior angles?

Exterior

How many congruent sides does a scalene triangle have?

0

How many congruent sides does an isosceles triangle have?

At least 2

How many congruent sides does an equilateral triangle have?

3

What type of triangle is an equilateral triangle also?

Isoceles

Which type of triangle has all (3) acute angles?

Acute

Which type of triangle has 1 right angle?

Right

Which type of triangle has 1 obtuse angle?

Obtuse

Which type of triangle has 3 congruent angles?

Equilateral

What type of triangle is an equiangular triangle also?

Acute

What is the sum of the measures of interior angles add up to (degrees)?

180

Fill in the blank: The measure of an exterior angle of a triangle is equal to the sum of the measures of two ____ angles.

Remote interior

Fill in the blanks: Two angles are congruent if they have the same ____ and ____.

Size, shape

Fill in the blank: Each part of congruent figures ____ to the other parts exactly.

Correspond

What is the term used to describe the two figures that are congruent that “match” up?

Corresponding parts

Give two examples of possible “corresponding parts.”

Angle and side

Fill in the blank: If two angles of one triangle are congruent to two angles of another triangle, then the third angles are also ____.

Congruent

Fill in the blank: The ____ of an isosceles triangle are two congruent sides.

Legs

Fill in the blank: The ____ angle of an isosceles triangle is the angle formed by the legs.

Vertex

Fill in the blank: The ___ of an isosceles triangle is the side that is opposite to the vertex angle.

Base

Fill in the blank: The ____ angles of an isosceles triangle are the two angles adjacent to the base.

Base

Fill in the blank: If two sides of an isosceles triangle are congruent then the ____ sides are also congruent.

Opposite

Fill in the blank: If two angles of an isosceles triangle are congruent then the ____ angles are also congruent.

Opposite

Fill in the blank: If a triangle is equilateral, then it is ____.

Equiangular

Fill in the blank: If a triangle is equiangular, then it is ____.

Equilateral