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Angles and Measurement

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Angles and Measurement

Help plan a mini-golf course by using angle clues. Read each task carefully. Use degrees (°) for angle measures.

Angle clues

1.A mini-golf sign says: “An angle is made when two rays meet at a point.” What is the name for the point where the rays meet?

Vertex
Length
Arc
Face

2.The first putting lane turns through 90°. What type of angle is this, and how many degrees are in a right angle?

3.Sort each course turn into acute, right, obtuse or straight: 35°, 90°, 125°, 180°.

35°
90°
125°
180°

Obtuse
Acute
Right
Straight

Measure, compare and reason

4.The number line shows four possible turn sizes for a tricky hole. Write the values from smallest to largest, then name the type of angle at 110°.

5.Two straight sections of a path meet at a point. The smaller angle between them is 68°. What is the size of the other angle on the straight line?

6.The gate at the course entrance opens from a closed position through 3 quarter-turns. How many degrees has it turned, and is that less than, equal to or greater than a straight angle?

7.A course designer has drawn two paths meeting at a vertex. Draw and label one acute angle and one obtuse angle. Include a degree measure for each.

8.Mere uses a protractor to measure a turn. Put these steps in the best order: read the scale where the other ray crosses; place the centre point on the vertex; line up the protractor’s baseline with one ray.

9.A rectangular mini-golf scorecard has four corners. Each corner is a right angle. What is the total of the four corner angles?