Help

MAFS.8.G.1.5

Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.
Subject Area: Mathematics
Domain-Subdomain: Geometry
Cluster: Level 2: Basic Application of Skills & Concepts
Cluster: Understand congruence and similarity using physical models, transparencies, or geometry software. (Major Cluster) -

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Date Adopted or Revised: 02/14
Date of Last Rating: 02/14
Status: State Board Approved
Assessed: Yes

TEST ITEM SPECIFICATIONS

• Item Type(s): This benchmark may be assessed using: EE item(s)

• Assessment Limits :

Items must not include shapes beyond triangles

• Calculator :

Neutral

• Context :

No context

SAMPLE TEST ITEMS (4)

• Test Item #: Sample Item 1
• Question:

What is the measure of , in degrees, in the figure shown? • Difficulty: N/A
• Type: EE: Equation Editor

• Test Item #: Sample Item 2
• Question:

What is the measure of , in degrees, in the figure shown? • Difficulty: N/A
• Type: EE: Equation Editor

• Test Item #: Sample Item 3
• Question:

Two similar triangles are shown. What is the measure of , in degrees?

• Difficulty: N/A
• Type: EE: Equation Editor

• Test Item #: Sample Item 4
• Question:

A figure with parallel lines m and n is shown. What is the measure, in degrees, of ?

• Difficulty: N/A
• Type: EE: Equation Editor