Question

In Triangle ABC,LA=80digree , LB=20digree
Then the measure of. LC equal _____?

Answer 1

Answer:

In Triangle ABC,

angle ABC+ angle BAC+ angle+ BCA= 180 degree (sum of interior angles of a triangle is 180 degree)

thereore, 20 degree+ 80 degree+ angle BCA=180

(note: angle BCA= angle C)

100 degree+ angle C= 180 degree

therefore, angle C=180- 100

angle C=80 degrees

Step-by-step explanation:

Hope it helps and mark me the brainliest

Answer 2

Given:

In a triangle ABC ∠A = 80°

∠B = 20°

To find:

The ∠C of the triangle ABC.

Solution:

The sum of angles in a triangle is 180°.

So in the given triangle ABC the sum of all the angles should also be 180°, therefore:

∠A + ∠B + ∠C = 180°

Now putting the values we get:

80° + 20° ∠C = 180°

100° + ∠C = 180°

Making ∠C as the subject of the formula we get:

∠C= 180°- 100°

∠C = 80°

Therefore the measure of the ∠C in the given triangle ABC is 80°.