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180 degrees
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How many of its angles must measure 90 on a rectangle?
All four angles of a rectangle must equal 90 degrees each.
Two angles that have the same measure must be congruent?
true
A right triangle must contain angles of measure less than 90?
Yes. In fact, it must contain TWO angles of measure less than 90 degrees.
Can a right triangle have two angles that measure 25 and 60?
no. the angles in a triangle must add up to 180 degrees. The right triangles must have an right angle (90 degrees). If you add up all the angles they will not measure 180 degrees.
What is the measure of the exterior angles of a pentagon?
The sum of the exterior angles of any polygon must be 360 degrees. Subject to that constraint, individual angles can have any measure between 0 and 360 degrees.
How many of its angles must measure 90 on a rectangle?
All four angles of a rectangle must equal 90 degrees each.
Two angles that have the same measure must be congruent?
true
A right triangle must contain angles of measure less than 90?
Yes. In fact, it must contain TWO angles of measure less than 90 degrees.
Can a right triangle have two angles that measure 25 and 60?
no. the angles in a triangle must add up to 180 degrees. The right triangles must have an right angle (90 degrees). If you add up all the angles they will not measure 180 degrees.
What is the measure of the exterior angles of a pentagon?
The sum of the exterior angles of any polygon must be 360 degrees. Subject to that constraint, individual angles can have any measure between 0 and 360 degrees.
If two angles are congruent then they are both right angles?
Not always. If two angles are congruent then they simply have equal measure. They must only be right angles if they are supplementary, that is, they must both add up to 180 degrees.
What is the name of a parallelogram with 4 right angles but not four congruent angles?
4 right angles, by definition, are four angles of the same measure, and therefore must be congruent angles.
Can a right triangle have two angles that measure of 25 and 65?
Yes. The general rule for angles is that the sum of the angles must be 180 degrees.
How many angles must measure 90 degrees in a parallelogram?
It is not a requirement that any of the angles are right angles (90 degrees), to qualify as a parallelogram.
What is the sum of the angles of right angles?
Right angles are 90°. The total measure of a triangle is 180°. So, the sum of the other two angles must equal 90°.
Which quadrilateral must have all four angles of equal measure?
a square or a rhombus
Are congruent angles angles that have measure?
Yes, congruent angles are angles that have the same measure.
