Geometry Problems and Angle Calculations

Problem 7

• O is the center of a circle
• COD forms an equilateral triangle
• The question asks for the value of x + y + z

Problem 8

• The diagram shows a triangle with two given angles
• The question asks to find the value of unknown angles x and y

Problem 8 (ii)

• The diagram shows a triangle with two given angles
• The question asks to find the value of unknown angle x

Problem 8 (iii)

• The diagram shows a triangle with two given angles
• The question asks to find the value of unknown angle x

Problem 8 (c)

• O is the center of a circle
• AB and CB are tangents to the circle at points A and C
• The question asks to find the value of x

Problem 9 (a)

• The question shows a diagram with two given angles
• The question requires marking the diagram correctly, with a checkmark (✔) if the angle values are correct, or a cross (X) otherwise