Triangle basics
What is the sum of the interior angles in any triangle?
180
What is the sum of the interior angles in any quadrilateral?
360
In a triangle, two angles are 50° and 60°. Find the third angle
70
True or False: A triangle can have two obtuse angles
False
Name a triangle that has all three sides and angles equal.
Equilateral
Name a quadrilateral with all sides equal and all angles right.
Square
A quadrilateral has three angles of 90°, 85°, and 95°. Find the fourth
90
Which type of quadrilateral can have opposite angles equal but not all sides equal?
Parallelogram
A triangle has angles measuring 40° and 70°. What is the third angle?
70
A rectangle has one angle of 90°, what are the other three angles?
All 90
In an isosceles triangle, one angle is 40°. What are the other two?
70 and 70
or 40 and 100
A triangle has two angles that differ by 20°, and the third is 40°. Find the triangle’s angles.
60°, 80°, 40°
What type of triangle has one angle more than 90°?
Obtuse triangle
Which quadrilateral has only one pair of parallel sides?
Trapezoid
In a parallelogram, one angle is 110°. What are the other three?
70°, 110°, 70°
A quadrilateral has angles x, 2x, 3x, and 3x. Find the value of x.
20
Can a triangle have two right angles? Explain why or why not.
No, because the angle sum would exceed 180
A quadrilateral has angles measuring 80°, 95°, and 100°. What is the fourth angle?
85
A triangle has one angle twice the second, and the third is 30°. Find all angles
30°, 50°, 100
A triangle has one angle three times the second, and the third is 30° more than the second. Find all angles.
30°, 90°, 60°