KS2 Primary Maths Age 9-13 - Angles - Triangles: - Explained

The video tutorial explains how to solve a geometry problem involving a right-angled triangle. The task is to find the values of X and Y, given that one angle is a right angle. The instructor demonstrates how to calculate X by using the sum of angles in a triangle and then proceeds to find Y by applying the properties of angles on a straight line. The tutorial concludes with a review of the solution and the allocation of marks for each step.

What is the first step in solving for the angles X and Y in the given triangle problem?

• Identify the right angle and solve for X first.

• Ignore the right angle and solve for X.

• Solve for both X and Y simultaneously.

• Identify the right angle and solve for Y first.

How do you calculate the value of X in the right-angled triangle?

• By subtracting 90 degrees from 180 degrees.

• By dividing 90 degrees by 4.

• By adding X and 4X to equal 90 degrees.

• By multiplying X by 5.

What is the value of X in the triangle?

• 90 degrees

• 72 degrees

• 36 degrees

• 18 degrees

How is the value of Y determined in the adjacent triangle?

• By dividing 180 degrees by 2.

• By subtracting 72 degrees from 180 degrees.

• By adding 72 degrees to 180 degrees.

• By multiplying 72 degrees by 2.

What is the value of Y in the triangle?

• 72 degrees

• 108 degrees

• 36 degrees

• 18 degrees

Which step is crucial for finding the value of Y?

• Dividing 72 by 2.

• Calculating 4X as 72 degrees.

• Calculating X as 18 degrees.

• Subtracting 108 from 180.

What is the total number of marks allocated for solving this problem?

• 6 marks

• 3 marks

• 4 marks

• 5 marks