OwlSheets
Star Camp Telescope Turns: Counting One-Degree Angles worksheet preview

Worksheet

Star Camp Telescope Turns: Counting One-Degree Angles

Grade 4 angle measure practice: count the one-degree clicks of a star camp telescope, read protractors, and see why n one-degree angles make n degrees.

Grade 4MathInteractive · Printable

Aligned to4.MD.C.5.b

Play onlinePlay as a game
PrintLetter-size worksheetAnswer keyPrintable answers
Assign to classAssign to your classes, or get a join code

What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 12 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 4
Subject
Math
Question types
Fill in the blank, Multiple choice, Matching, Sorting, Short answer

About this worksheet

What students practice

  • Students explain that an angle that turns through n one-degree angles measures n degrees.
  • Students read a protractor to count the one-degree angles in a turn.
  • Students find the total degrees in a turn made of several groups of one-degree clicks.

How to use

Before students start, model one click as a 1° turn with a paper protractor and a pencil. For the protractor questions, students can count by tens and fives along the marks.

Curriculum

Common Core standard covered

4.MD.C.5.b

Understand that an angle turning through n one-degree angles measures n degrees.

Preview

OwlSheets.com

Name Date

Star Camp Telescope Turns: Counting One-Degree Angles

Every click turns the telescope 1°. Count the clicks to find the angle.

One click, one degree

At star camp, the telescope turns one click at a time. Each click turns it through a one-degree angle, which measures 1°.

1.
Rosa turns the telescope 40 clicks to point it at the Moon. What is the measure of the angle it turns through?

The angle measures   degrees.

2.
Dev turns the telescope through an angle that measures 75°. How many one-degree clicks did he make?

Dev made   one-degree clicks.

3.
Match each turn of the telescope to the kind of turn it makes.
  1. 90 one-degree angles
  2. 180 one-degree angles
  3. 360 one-degree angles
  4. 45 one-degree angles
  1. A. a half turn
  2. B. a full turn
  3. C. half of a right angle
  4. D. a right angle (a quarter turn)
4.
Two telescopes sit side by side. The big telescope is 6 feet long. The small telescope is 2 feet long. Each one turns 30 clicks. Which sentence is true?
  • A. The big telescope turns through a larger angle.
  • B. Both telescopes turn through an angle of 30°.
  • C. The small telescope turns through a larger angle.
  • D. The big telescope turns through 180° because 6 × 30 = 180.

Read the protractor

The telescope starts at the 0 mark. The numbers count one-degree angles from 0, and each short mark is halfway between two numbers.

5.
Wes turns the telescope from the 0 mark to the ray shown.0102030405060708090100110120130140150160170180

The telescope turns through   one-degree angles.
So the angle measures   degrees.

6.
Priya turns the telescope from the 0 mark to the ray shown. What is the measure of the angle?0102030405060708090100110120130140150160170180
  • A. 60°
  • B. 115°
  • C. 65°
  • D. 70°
7.
Hana wants the telescope to point straight up, at the 90 mark. Right now it points along the ray shown.0102030405060708090100110120130140150160170180

Right now the telescope points at the   mark.
It needs   more one-degree clicks to reach the 90 mark.

8.
The telescope turned from the 0 mark to the ray shown. Which sentences are true? Choose all that are true.0102030405060708090100110120130140150160170180
  • A. The angle is made of 120 one-degree angles.
  • B. The angle is made of 125 one-degree angles.
  • C. The angle measures 55°.
  • D. The angle measures 125°.

Star camp challenges

Each click is still a one-degree turn. All the turns go in the same direction.

9.
To follow a star across the sky, the telescope turns 2 clicks every minute. How many degrees does it turn in 25 minutes?

The telescope turns   degrees in 25 minutes.

10.
Ava turns the telescope 25 clicks, then 40 clicks, then 15 clicks. What is the measure of her whole turn?

Ava's whole turn measures   degrees.

11.
Sort each telescope turn. Is it less than or more than a right angle (90°)?
89 one-degree angles120 one-degree angles45 clicks, then 50 more clicks60 clicks, then 25 more clicks91 one-degree angles
Less than 90°More than 90°
12.
Explain how you know that a turn of 72 one-degree angles measures 72°.

Related worksheets