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P5 Maths: Measuring and Estimating Angles (Paper 2 (intermediate))
Tutor Prep Guide · Protractor readings, right, straight and full angles, complementary and supplementary angles, angles on a line and about a point, vertically opposite angles and estimating angles
P5 Maths: Measuring and Estimating Angles (Paper 2 (intermediate))
Paper 2 (intermediate): ten angle questions on protractor readings, right, straight and full angles, complementary and supplementary angles, with answers and one-line notes.
Direct answers Level: P5 maths; format: protractor readings, right, straight and full angles, complementary and supplementary angles, angles on a line and about a point, and estimating angles.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P5 Maths: Measuring and Estimating Angles |
| Level | P5 |
02 Questions (10 items)
- FoundationAn angle and an angle of 28 degrees make a right angle. How many degrees is that angle?
- FoundationAn angle and an angle of 47 degrees make a straight angle. How many degrees is that angle?
- FoundationFour angles meet at a point; three of them are 90, 90 and 120 degrees. How many degrees is the fourth angle?
- IntermediateThree angles lie on a straight line: 38 degrees, 79 degrees and x. Find x.
- IntermediateAn angle is a little larger than a right angle. Which reading is closest: 45 degrees, 100 degrees or 170 degrees?
- IntermediateTwo straight lines cross. One of the angles is 130 degrees. How many degrees is its vertically opposite angle?
- ChallengeTwo angles add up to 180 degrees and differ by 40 degrees. How many degrees is the larger angle?
- ChallengeThree angles about a point are 2x, x and x. Find x.
- ChallengeA spotlight turns from 0 degrees to 145 degrees. How many more degrees must it turn to reach a straight angle?
- Error redoA student worked out 180 minus 65 and got 125. What is the correct number of degrees?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 62 degrees | 90 minus 28 is 62. |
| 2 | 133 degrees | 180 minus 47 is 133. |
| 3 | 60 degrees | 360 minus 90 minus 90 minus 120 is 60. |
| 4 | 63 degrees | 180 minus 38 minus 79 is 63. |
| 5 | 100 degrees. | Compare with 90 degrees first; an angle slightly larger than a right angle is close to 100 degrees. |
| 6 | 130 degrees. | Vertically opposite angles are equal, so the opposite angle is also 130 degrees. |
| 7 | 110 degrees | Add 40 to 180 and divide by 2 to get 110. |
| 8 | 90 degrees | 2x plus x plus x is 4x, and 4x is 360, so x is 90. |
| 9 | 35 degrees | 180 minus 145 is 35. |
| 10 | 115 degrees | Take care when regrouping; 180 minus 65 is 115. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Check the answers; for a wrong item, confirm whether the total is 180 or 360 degrees, then work it again.Tutor Registration →
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