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

7.04 Medians and altitudes

Lesson
Practice
Adaptive
Worksheet

Interactive practice questions

In the triangle shown below, what does the dashed line represent?

A triangle is depicted with a dashed line connecting a side and its opposite vertex. The side is divided into two segments and are congruent as suggested by the single-hash marks on each divided side.

An angle bisector

A

A perpendicular bisector

B

An altitude

C

A median

D
Easy
< 1min

In the triangle shown below, what does the dashed line represent?

Easy
< 1min

In the triangle shown below, what does the dashed line represent?

Easy
< 1min
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Outcomes

G.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.

G.CO.D.12

Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line.

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