KS2 Primary Maths Age 9-13 - Ratio: - Explained

The video tutorial explains how to calculate the angles of a triangle given in a ratio of 1:2:3. It starts by reminding that the sum of angles in a triangle is 180 degrees. The problem is solved by dividing 180 by the sum of the ratio parts, which is 6, to find the value of one share. Each angle is then calculated by multiplying the share value by the respective ratio part. The final angles are 30, 60, and 90 degrees. The video also discusses the allocation of marks for solving the problem.

What is the total sum of angles in any triangle?

• 90 degrees

• 270 degrees

• 180 degrees

• 360 degrees

If the angles in a triangle are in the ratio 1:2:3, what is the sum of the ratio parts?

• 7

• 5

• 6

• 8

How do you calculate the value of one share in the ratio 1:2:3 for a triangle's angles?

• Divide 180 by 6

• Add 180 to 6

• Multiply 180 by 6

• Divide 180 by 3

What is the measure of the smallest angle in a triangle with angles in the ratio 1:2:3?

• 90 degrees

• 60 degrees

• 120 degrees

• 30 degrees

What is the measure of the largest angle in a triangle with angles in the ratio 1:2:3?

• 30 degrees

• 60 degrees

• 90 degrees

• 120 degrees