0
When they add up to 90 degrees.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
How do you know if angles are congruent?
If their measures are equal, then the two angles are congruent.
If you know that two of the angles in a quadrilateral are obtuse then what is true about the other two angles and Explain?
You know that at least one of them must be acute. A quadrilteral can have three obtuse angles, but not four.
Find the angles in a quatrilateral when you know 2 angles?
The sum of all four angles is 360 degrees. Thus, you have insufficient information to know the individual angles; you can only know their sum, which is 360 minus the sum of the other two angles.
How do you know what shapes have two right angles?
If there are two 90 degree angles on the shape (example: squares or rectangles' corners)
How do you know if two angles are congruent?
They have the same measure.
How to wokout triangle angles?
That depends, what it is you know. For example, if you know two of the angles, you can use the rule that the sum of the three angles must be 180 degrees. If you know the sides, the calculation is different, and involves trigonometry.
What is the degree for a complementary angle?
Two anlges are complementary if the sum of their degree is 90. So given any angle A less than 90, if angle B is complemenatry its has degree measurement 90-A.
An isosceles triangle has a vertex angle of 50 degrees. what are the measures of the other two angles?
Since All the Angles of a Triangle add up to 180o and Since we know that Two Sides (and therefore two Angles) in an Isosceles are equal.So we can get the SUM of the other two angles is 180o - 50o = 130o.And therefore the other two angles are 130o / 2 = 65o
How do you know what angles in a triangle are worth using algebra?
If the triangle is equilangular, then all angles are 60 degrees: 180/3 = 60 If the measures of two angles are given, you can discover the 3rd one by subtracting the sum of the two angles from 180.
How do you find the length of the hypotenuse with two angles?
Two angles are not enough to define the length of anything in a triangle. You also need to know the length of one side.
Are triangles congruent if so how do you know?
ASA stands for "angle, side, angle" and means that we have two triangles where we know two angles and the included side are equal. If two angles and the included side of one triangle are equal to the corresponding angles and side of another triangle, the triangles are congruent.
How do you know a rectangle is 7x14?
Check that two of the adjacent sides are 7 and 14 units of length, and that three of the angles are right angles.
