Triangle Classification

An angle measuring exactly 90 degree that makes a corner.

• Right Angle

• Acute Angle

• Straight Angle

Answer explanation

The sum of the angles of a triangle is 180 degrees. There can only be one right angle per triangle.

Tags

CCSS.4.G.A.1

An angle measuring less than 90 degrees

• Acute Angle

• Right Angle

• Smallish Angle

Answer explanation

It is possible to have all 3 angles in a triangle be acute.

Tags

CCSS.4.G.A.1

An Obtuse Angle measures ______ 90 degrees

• Equal to

• Less than

• More than

Answer explanation

There can only be one obtuse angle per triangle.

Tags

CCSS.4.G.A.1

What is the name for the longest leg of a right triangle?

• Opposite

• Hypotenuse

• Hypodermic

Answer explanation

The hypotenuse is ALWAYS opposite the largest angle.

Tags

CCSS.HSG.SRT.B.4

CCSS.HSG.SRT.C.6

CCSS.HSG.SRT.C.8

How many right angles does a right triangle have?

• 1

• 2

• All 3 angles must be right angles

Answer explanation

You can't ever have more than 1.

Tags

CCSS.4.G.A.2

Does an obtuse triangle contain more than one angle that measures more than 90 degrees?

• yes

• no

Answer explanation

If you had more than one obtuse angle, your triangle would not close.

Tags

CCSS.4.G.A.2

How many angles are acute angles in an acute triangle?

• 1

• 2

• 3

Tags

CCSS.4.G.A.2

Which are characteristics of an Equilateral Triangle?

• 2 equal sides

• 3 equal sides

• no equal angles

• 2 equal angles

• 3 equal angles

Answer explanation

EQUAL = EQUIL

Tags

CCSS.4.G.A.2

What is the name of a triangle when no sides or angles are congruent?

• scarce

• scalene

• shiply

Tags

CCSS.4.G.A.2

What is true about Isosceles Triangles?

• no sides are congruent

• 2 sides are congruent

• 3 sides are congruent

• 2 angles are congruent

• 3 angles are congruent

Tags

CCSS.HSG.CO.C.10