9. Shapes and angles

9.01 Points, lines and rays

9.02 Angles within a circle

9.03 Angles and angle types

EXPLORE: Draw angles

9.04 Right angles

9.05 Estimate angles

9.06 Measure and compare angles

9.07 Angles on a straight line

9.08 Angles at a point

9.09 Classify 2D figures

United States of America Tennessee

Grade 4

9.07 Angles on a straight line

Interactive practice questions

What is the total measure of angles on a straight line?

$90^\circ$90°

A

$180^\circ$180°

B

Easy

< 1min

Do the angles in the diagram add to $180^\circ$180°?

Easy

< 1min

Find the size of the missing angle.

Easy

< 1min

Find the size of the missing angle.

Easy

< 1min

Outcomes

4.MD.C.7

Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real-world and mathematical problems. (e.g., by using an equation with a symbol for the unknown angle measure).

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