Comparing & classifying isosceles and scalene triangles

Comparing & classifying isosceles and scalene triangles

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Lesson details

Key learning points

  1. In this lesson, we will compare different triangles and introduce isosceles and scalene triangles.

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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6 Questions

Q1.
Which properties do all triangles have?
2 sides and 3 vertices
3 sides and 2 vertices
Correct answer: 3 sides and 3 vertices
4 sides and 4 vertices
Q2.
What is the name given to a regular triangle?
Correct answer: Equilateral triangle
Regularity
Right angled triangle
Trapezium
Q3.
Which of the statements best describe an equilateral triangle?
1 angle equal to 90 degrees
2 angles equal to 180 degrees
Correct answer: 3 angles, where each angle is equal to 60 degrees
3 sides with different measurements
Q4.
Which statement best describes a right angled triangle
Correct answer: 1 angle that measures to 90 degrees
3 angles that measure exactly the same
A triangle with a width of 10cm
A triangle with three 60 degree angles
Q5.
It is possible to create a large equilateral triangle from either...
2 or 4 smaller equilateral triangles
3 or 5 smaller equilateral triangles
Correct answer: 4 or 9 smaller equilateral triangles
6 or 9 smaller equilateral triangles
Q6.
If a triangle has the angles: 60 degrees and 30 degrees, what is the 3rd angle?
180 degrees
30 degrees
60 degrees
Correct answer: 90 degrees

5 Questions

Q1.
What is the name given to a triangle with 3 equal sides?
Correct answer: Equilateral triangle
Right angled triangle
Scalene triangle
Trapezium
Q2.
What is the name given to a triangle which has the following three angles: 80°, 40° and 60° ?
Equilateral triangle
Isosceles triangle
Right angled triangle
Correct answer: Scalene triangle
Q3.
If a triangle has the angles of 90° and 60°, what is the third angle?
180°
Correct answer: 30°
40°
90°
Q4.
Which of these are NOT interior angles of a triangle?
Correct answer: 40°, 55° and 75°
60°, 60° and 60°
70° , 70° and 40°
Correct answer: 80°, 20° and 70°
Q5.
A right angled triangle can also be ...
a scalene or an equilateral triangle
Correct answer: a scalene or isosceles triangle
an equilateral triangle
an isosceles or an equilateral triangle

Lesson appears in

UnitMaths / 2-D shape, perimeter and area