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Pairs of Angles
1.Complementary Angles
-are two angles together complete a right angle.
*The two angles need not be to be adjacent.
-to find the complement angle subtract the given angle from 90°.
Ex: Give the complement of 65°.
1. 90°-65° =25° (25+ 65=90)
2. 90°-70° =20° (20+ 70=90)
2.Supplementary Angles
-are two angles whose measurements are equal to 180°.
*The angles not also be adjacent.
-To find the supplement angle, subtract the given angle from 180°.
Ex:
1. Give the supplement of 130°.
180°-130°=50°
3.Adjacent Angles
-two angles with a common side and the same vertex.
4.Vertical angles
-are opposite angles formed two intersecting lines.
They have a common vertex but no common side.
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What are angles called where transversely line crosses two parallel lines?
Different pairs of angles have different names.
What shape has 4 equal sides and 4 different angles?
No shape has four equal sides and four different angles - either there are two pairs of equal angles, or all four angles are the same; or all sides are not the same length.
What are the values of an isosceles trapezoids angles?
An isosceles trapezoid has 2 pairs of equal angles of different sizes and they add up to 360 degrees
Can an angle have two pairs of vertical angles and two pairs of congruent angles?
No. An angle can have only one angle!
Are the angles in a quadrilateral opposite or adjacent?
- Opposite angles are two angles that don't share a side. A quadrilateral has two pairs of them. - Adjacent angles are angles that share one side. A quadrilateral has four pairs of them.
What are angles called where transversely line crosses two parallel lines?
Different pairs of angles have different names.
What are alternate exterior angles?
they are angles that are usually parallel and that crossed the line that are oppsite from each other
A quadrilateral has exactly two congruent angles?
A parallelogram has 2 pairs of congruent angles of different sizes
Two pairs of parallel sides and all angles congruent?
Two different quadrilaterals have two pairs of parallel sides and have all their angles congruent. They are the square and the rectangle.
What Quadrilateral has 2 pairs of equal angles?
A parallelogram has two pairs of equal angles, but each pair may be at a different angle. A rectangle has two pairs of equal angles that are also equal to each other.
Which pairs of angles are formed by two intersecting angles?
They are equal vertical opposite angles or 2 pairs of equal angles.
What is angles and angle pairs?
Angles are two rays angle pairs have 2 angles that make into 90 or 180 degresses
What is a shape that has 2 pairs of opposite parallel sides congruent angles 2 acute angles?
It could be a hexagon which is stretched out so that one pair of opposite angles become acute - but they must be different otherwise you will have three pairs of parallel sides.
What shape has 4 equal sides and 4 different angles?
No shape has four equal sides and four different angles - either there are two pairs of equal angles, or all four angles are the same; or all sides are not the same length.
What is the different of a square and a diamond?
All four angles of a square are equal (to 90 degrees). In a diamond, which is a rhombus, there are two pairs of equal angles.
Are all linear pairs supplementary angles?
supplementary can sure be a linear pair. As long as their is 2 different angles and they equal 180 degrees.
What are the values of an isosceles trapezoids angles?
An isosceles trapezoid has 2 pairs of equal angles of different sizes and they add up to 360 degrees
