Finding missing angle and the value of x.

Find the three missing angles in a triangle.

Angle a = x

Angle b = 2x

Angle c = 3x

• Angle a = 30 degrees, Angle b = 60 degrees, Angle c = 90 degrees
• Angle a = 15 degrees, Angle b = 30 degrees, Angle c = 135 degrees
• Angle a = 20 degrees, Angle b = 40 degrees, Angle c = 120 degrees
• Angle a = 45 degrees, Angle b = 90 degrees, Angle c = 45 degrees

Find the three missing angles in a triangle.

x = 10 degrees

Angle a = 4x

Angle b = 5x

Angle c = 9x

• Angle a = 45 degrees, Angle b = 45 degrees, Angle c = 90 degrees
• Angle a = 30 degrees, Angle b = 60 degrees, Angle c = 80 degrees
• Angle a = 40 degrees, Angle b = 50 degrees, Angle c = 90 degrees
• Angle a = 20 degrees, Angle b = 30 degrees, Angle c = 50 degrees

There is a triangle

which its angle b is 3x or 99degrees.

Find the value of the x.

• 33
• 40
• 36
• 30

There is a triangle

which its angle b is 4x or 104 degrees.

Find the value of the x.

• 20
• 30
• 40
• 26

There is a triangle

which its angle a is 5x or 85 degrees.

Find the value of the x.

• 17
• 20
• 10
• 15

Consider a triangle where angle a is 3x and angle c is 7x.

If angle a is equal to 30 degrees, find the value of x.

• 20

• 15

• 5

• 10

In a triangle, angle b is represented as 6x and angle c is represented as 2x.

If angle b is 72 degrees, what is the value of angle c?

• 12 degrees

• 48 degrees

• 36 degrees

• 24 degrees