Topics
3. Triangles
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United States of America
Grades 9-12

3.04 Angle and perpendicular bisectors

Lesson
Practice
Adaptive
Worksheet

Interactive practice questions

Consider the following triangle construction.

a

Identify the type of construction.

Median

A

Altitude

B

Perpendicular bisector

C

Angle bisector

D
b

The three angle bisectors of a triangle are concurrent at which triangle center?

Incenter

A

Circumcenter

B

Centroid

C
Easy
1 min

Consider the following triangle construction.

Easy
1 min

Determine which triangle center matches each of the following descriptions.

Easy
1 min

Consider where the incenter is located for different types of triangles.

Medium
1 min
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Outcomes

HSG.CO.C.10

Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180°; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.

HSG.C.A.3

Construct the inscribed and circumscribed circles of a triangle, and prove properties of angles for a quadrilateral inscribed in a circle.

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