Constructing triangles

Constructing triangles

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Lesson details

Key learning points

  1. In this lesson, we will learn how to construct triangles using a pair of compasses and ruler given the length of the sides. We will need a pair of compasses, pencil and ruler for this lesson.

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6 Questions

Q1.
Label this part of the circle
An image in a quiz
Correct answer: Arc
Diameter
Radius
Tangent
Q2.
Label this part of the circle
An image in a quiz
Arc
Circumference
Correct answer: Diameter
Radius
Q3.
Label this part of the circle
An image in a quiz
Arc
Circumference
Diameter
Correct answer: Radius
Q4.
What is the circumference of a circle?
The circumference is also the radius of a circle
The circumference is the area of the circle
Correct answer: The circumference is the distance around a circle
Q5.
Complete the sentence. The diameter of a circle is...
Half the radius of the circle
Others
The length of the circle
The same as the radius of a circle
Correct answer: Twice the radius of a circle
Q6.
The radius of my circle is 8.5cm. What is the diameter of the circle?
16cm
Correct answer: 17cm
4.25cm
8.5cm

5 Questions

Q1.
If you know the length of the sides of a triangle, you can _______ it using a pair of ______.
Correct answer: construct, compass
construct, protractor
draw, compass
make,ruler
Q2.
This circle is drawn on a centimetre square grid. State the radius and diameter.
An image in a quiz
Radius = 2cm, Diameter = 2cm
Correct answer: Radius = 2cm, Diameter = 4cm.
Radius = 4cm, Diameter = 2cm
Q3.
This circle is drawn on a centimetre square grid. State the radius and diameter.
An image in a quiz
Correct answer: R = 1cm, D = 2cm
R = 1cm; D = 1cm
R = 2cm; D = 1cm
Q4.
This circle is drawn on a centimetre square grid. State the radius and diameter.
An image in a quiz
Others
R = 4cm, D = 4cm
Correct answer: R = 4cm, D = 8cm.
R= 8cm, D = 4cm
Q5.
Two students were asked to construct a triangle with side lengths 3 cm , 2 cm and 4 cm. Are they both correct?
An image in a quiz
No, they are not both correct. Only B is correct because she mentioned the shortest angle first then measured the rest.
No, they are not both correct. Only student A is correct because the base is 3cm.
Correct answer: Yes, they are both correct because both of the triangles are identical (congruent) but they are orientated differently.

Lesson appears in

UnitMaths / Constructing triangles and quadrilaterals