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P4 Maths Classifying Triangles Paper 1: Basics
P4 Maths Classifying Triangles Paper 1: Basics
Ten original items, each with an answer and a one-line explanation.
Direct answers Items 1-3 are basic, 4-6 intermediate and 7-9 challenge, with item 10 as the error review. Time yourself first, then check each answer and redo what is wrong.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 15 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P4 Maths Classifying Triangles |
| Level | P4 |
02 Questions (10 items)
- FoundationWhat kind of triangle has all three angles equal to 60°?
- FoundationWhat do we call a triangle with all three sides 7 cm long?
- FoundationWhat is a triangle with one angle of 90° called?
- IntermediateTwo angles of a triangle are 90° and 45°. What is the third angle?
- IntermediateA triangle has sides 5 cm, 5 cm and 8 cm. How is it classified by its sides?
- IntermediateA triangle has angles 120°, 30° and 30°. How is it classified by its angles?
- ChallengeTwo angles are 65° and 70°. Find the third angle and classify the triangle.
- ChallengeA triangle has sides 3 cm, 4 cm and 5 cm. How is it classified by its sides?
- ChallengeWhat is each angle of an equilateral triangle?
- Error redoError review: a pupil says any triangle with two equal angles is equilateral. Is that right?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | An equilateral triangle (also acute-angled) | Equal angles face equal sides, so all three sides are the same length. |
| 2 | An equilateral triangle | Three equal sides make an equilateral triangle, and each angle is 60°. |
| 3 | A right-angled triangle | A triangle containing a right angle of 90° is a right-angled triangle. |
| 4 | 45 degrees | The angles of a triangle add to 180°, so 180 minus 90 minus 45 = 45 degrees. |
| 5 | An isosceles triangle | Only two sides are equal (both 5 cm), so it is isosceles, not equilateral. |
| 6 | An obtuse-angled triangle | One angle of 120° is greater than 90°, so the triangle is obtuse-angled. |
| 7 | 45 degrees, and it is acute-angled | 180 minus 65 minus 70 = 45 degrees; all three angles are below 90°, so it is acute-angled. |
| 8 | A scalene triangle | All three sides are different, so it is a scalene triangle. |
| 9 | 60 degrees | The three angles are equal, and 180 divided by 3 = 60 degrees. |
| 10 | No, two equal angles make it isosceles | An equilateral triangle needs all three angles to be 60°; with only two equal angles it is just isosceles. |
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.
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Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.