Remember the sum of the 3 angles of a triangle = 180degrees
Let angle 1 = x
angle 2 = 2x
angle 3 = x-20
Sum = x + 2x + x - 20 =180o
4x - 20 = 180o
4x = 200o
x = 50o
2x = 100 o
x - 20 = 30o
angle 1 = 50o
angle 2 = 100 o
angle 3 = 30o
The missing angle measure is 100 degrees.
measure of exterior angle of triangle is equal to sum of interior angles. for eg. In triangle ABC, angle C is exterior angle angle A and angle B are interior angles so, C=A+B
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.
77. The sum of the three angles in a triangle equal the sum of 180 degrees
The third angle of a triangle is equal to 180 degrees minus (the sum of the first two angles).
The angles are 40, 80 and 60 degrees.
Two angles of a triangle add up to 65°. What is the measure of the third angle?
Let the second angle of the triangle be A. Then angle 1 = 2A : and angle 3 = 3A - 12 The internal angles of a triangle total 180° therefore :- 2A + A + (3A - 12) = 180 6A - 12 = 180 : 6A = 192 : A = 32 The angles measure 64° , 32° and 84° .
180- total of the first two angles= 3rd angle
The missing angle measure is 100 degrees.
They are all 60 degrees.
If all three angles of a triangle measure less that 90 degrees (if all three angles are acute), the triangle is an acute triangle. A triangle that has a right angle (an angle the measures exactly 90 degrees) is a right triangle. (The other 2 angles will be acute angles.) A triangle that has an angle that is greater than 90 degrees (an obtuse angle), is an obtuse triangle. (The other 2 angles will be acute angles.)
the sum of the angles of a plane triangle is always 180° In an equilateral triangle, each of the angles is = Therefore, the angles of an equilateral triangle are 60°
measure of exterior angle of triangle is equal to sum of interior angles. for eg. In triangle ABC, angle C is exterior angle angle A and angle B are interior angles so, C=A+B
A Triangle which do not have a right angle.
It is a straight line which divides an interior angle of the triangle into two angles of equal measure.
If you mean angles then it is a right angle triangle or an isosceles right angle triangle