answersLogoWhite

0

For all triangles drawn on a plain ( 2-dimensional) surfacem the sum of the three interior angles is 180 degrees.

Hence if the sum of two angles is 125 degrees.

Then the third angle is 180 - 125 = 55 degrees.

User Avatar

lenpollock

Lvl 17
10mo ago

What else can I help you with?

Continue Learning about Trigonometry

What is the third angle of a right triangle if one of the angles measures Y?

If Y is the right angle then the third angle is indeterminate. Otherwise it is 90 - Y degrees.


If the measures of two angles of an isosceles triangle are 54 and 63 degrees what is the measure of the third?

In an isosceles triangle, two angles are equal. Since the angles provided are 54 degrees and 63 degrees, the equal angles must be 54 degrees. The sum of the angles in any triangle is 180 degrees. Thus, the measure of the third angle is calculated as follows: 180 - 54 - 54 = 72 degrees.


If an isoceles triangle has angles of 20 degreesand 80 degreees what is the measure fore third angle?

The 3rd angle is 80 degrees


How do surveyors use trigonometry?

If you know two sides of a triangle, trig lets you find the third. So if you want to know the distance across a lake, measure two lines along the side of the lake such that they form a triangle with the line across the lake, and you can find the distance across. You can also find one side if you know one side and the angles at either end. This can be used to find the heights of objects - you know the angle it makes to the ground, how far you are from it, and what angle you have to look at to see the top.


What quadrant does -135 degrees?

Third quadrant. From the origin (0,0) and on the positive x-axis. Move an arrow/line clockwise from this axis by 135 degrees. The first 90 degrees are in the bottom right (4th)quandrant. The next 90 degrees(to 180 degrees ; includes 135) will be in the bottom left (3rd) quadrant. NB From the positive x-axis ,moving anti-clockwise about the origin the angles are positive. When moving clockwise from the same axis the angles are negative.

Related Questions

The sum of the measure of two angles of a triangle is 95 degrees What is the measure of the third angle?

The third angle is 85 degrees. The sum of all internal angles in a triangle is always 180 degrees


If two angles of a triangle are complementary what is the measure of the third angle?

If two angles of a triangle are complementary, it means they add up to 90 degrees. Since the sum of the angles in a triangle is always 180 degrees, the third angle would be 180 degrees minus 90 degrees, which equals 90 degrees. Therefore, the measure of the third angle in this triangle would be 90 degrees.


What is a triangle with angles of 60 degrees and 30 degrees?

The third angle has to be 90 degrees so it would be a right angle triangle.


What is the third angle of a triangle if the sum of the other two angles is 148 degrees?

The sum of the angles of a triangle is 180 degrees. If the sum of two of a triangle's angles is 148, then the third angle must be 180 - 148 = 32 degrees.


How do you determine the third angle of a triangle if 2 angles are known?

There are 180 degrees in a triangle. So, if you subtract two angles (angles A and B) from 180 degrees, you get the third angle (angle C). So: 180 - A - B = C


A triangle has one angle of 80 degrees an another of 60 degrees how many degrees must there be in the third angle?

The sum of the angles of a triangle is 180 degrees. So we have: 80 + 60 = 140 degrees, the sum of the two angles of the triangle 180 - 140 = 40 degrees, the measure of the third angle. Thus the measure of the third angle is 40 degrees.


What if two angles of a triangle are complemenatr what is the measure of the third angle?

The sum of two complementary angles is 90 degrees. The three angles of a triangle add up to 180 degrees. Hence, if you subtract the complementary angles from 180, you have the measure of the third angle: 180 - 90 = 90 (this is the third angle) As a rule, if two angles of a triangle are complementary, the third angle is a right angle (90 deg). The three angles together form a right triangle.


If two angles in a triangle are 120 degrees what would the third angle be?

The premise is impossible. The sum of the angles of a triangle is 180 degrees.


The measure in a third angle in a triangle with angle in a triangle with angles of 39 and 77 degrees is.?

180-39-77 = 64 degrees


What is the measure of the third angle of the triangle?

The third angle of a triangle is equal to 180 degrees minus (the sum of the first two angles).


What is the measure of the third angle of a triangle if one angle measures 15 degrees and the other measures 85 degrees?

The sum of the measures of the angles of a triangle is 180 degrees. First, calculate the sum of the two known angles. Then subtract that result from 180. That difference is the measure of the third unknown angle. Given: One angle of a triangle is 15 degrees and the second angle of the triangle is 85 degrees. To find: We need to find the third angle of the triangle. Let the third angle of the triangle be x. We know that the sum of the angles in a triangle is 180 degrees. ==> 15 degrees + 85 degrees + x degrees = 180 degrees. ==> 100 degrees + x degrees = 180 degress. ==> x = 180 degrees - 100 degrees. ==> x = 80 degress. Therefore the third angle of the triangle is 80 degrees.


Two angles of a triangle have measures of 59 degrees and 28 degrees. find the measure of the third angle.?

The third angle is 93 degrees