Solving for Angles in Triangles

In this video, Teacher Satya explains how to find the missing angle of a triangle. The tutorial begins with an introduction to the properties of triangles, emphasizing that the sum of all angles in a triangle is 180 degrees. The video then provides step-by-step solutions to three different problems involving missing angles. In the first problem, the missing angle is found using basic arithmetic. The second problem involves finding an angle when two angles are equal. The third problem requires solving for two variables using triangle properties and a straight line. The video concludes with a call to action to like and subscribe.

What is the main topic of the video?

• Calculating the perimeter of a triangle

• Finding the missing angle of a triangle

• Understanding the types of triangles

• Finding the area of a triangle

What is the sum of all angles in a triangle?

• 90 degrees

• 360 degrees

• 180 degrees

• 270 degrees

If a triangle has angles of 45 and 70 degrees, what is the measure of the third angle?

• 75 degrees

• 55 degrees

• 65 degrees

• 85 degrees

What is the first step in solving for the missing angle in the first example problem?

• Add 45 and 70

• Add 45 and x

• Subtract 70 from 180

• Subtract 45 from 180

What is the equation used to find the missing angle in the first example problem?

• x = 180

• 45 + 70 + x = 180

• 45 + x = 180

• 70 + x = 180

In the alternative method for the first problem, what is the result of 70 plus 45?

• 115

• 105

• 135

• 125

What is the final step in the alternative method for solving the first problem?

• Divide 115 by 2

• Multiply 115 by 2

• Subtract 115 from 180

• Add 115 to 180

What is the alternative method for solving the first example problem?

• Subtract 45 from 180

• Add 45 and 70, then subtract from 180

• Multiply 45 by 2

• Divide 70 by 2

In the second example problem, what is the equation used to find x?

• x + x = 180

• x + 110 = 180

• x + 110 + 70 = 180

• x + x + 110 = 180

What is the value of x in the second example problem?

• 40 degrees

• 45 degrees

• 35 degrees

• 30 degrees