# Angles on a Straight Line Worksheets

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4. Angles on a Straight Line

Spruce up practice with our angles on a straight line worksheets pdfs packed full of exercises to prepare 4th grade and 5th grade children to find the missing or unknown angles on a straight line with utmost accuracy. Since all the angles lie on a straight line and are adjacent, the angle addition postulate comes into play. Add the known angles and subtract the sum from 180° to find the measure of the indicated angle. Begin right with our free worksheet.

Finding the Unknown Angle

This pdf exercise tasks wannabe mathletes in 4th grade with finding the measure of an angle that shares a common vertex with the other angles on a straight line. Remember, angles on a straight line add to 180 degrees.

Finding the Value of x

Kids in 5th grade will finish strong with this angles on a straight line pdf set, where the task is to find x. To find the value of x for each given figure, sum up the angles on a straight line and equate them to 180°.

Identifying the Value of x to Find the Unknown Angles

Buckle up to answer this challenging exercise, in which math enthusiasts find the value of x and figure out the unknown angles as well! Use the given equation to complete the task in a jiffy.

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