Question

21. To construct a AABC, given AB = 7
cm, angle A = 35° and angle B = 40°,
the measure of third angle​

Answer 1

Answer:

115

Step-by-step explanation:

• draw a line segment of 7 cm AB
• draw angle of 35 degree from point A
• draw angle of 40 degree from point B
• named the intersection point as c
• measure the angle from c then the answer comes

also the sum of angles is 180 degree

35+40+x =180

75+x=180

x=180-75

x=115

Answer 2

Given - Angles

Find - Measure of the third angle

Solution - The measure of the third angle is 105°

As per the known fact, the sum of all the angles of the triangle is 180°.

Let the third angle be x

So, 35 + 40 + x = 180

Performing addition to finding the value of x

75 + x = 180

Shifting 75 to Right Hand Side

x = 180 - 75

Performing subtraction to find the value of x

x = 105

The measure of the third angle is 105°.