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math chapter 13
Question | Answer |
---|---|
Similar figures are? | They have the exact same shape but NOT the same size. |
Congruent figures are? | =~ They have the exact same shape AND size. |
Lines of symetry? | - Separates the figue into two matching halves. |
Rotational symetry? | -Some figures can be turned less than 360 degrees and look exactly as it did before it turned. |
Triangle? | -180 degrees all together. |
Equilateral triangle? | -all sides and all angles congruent. |
Isosceles triangle? | - 2 congruent sides 2 congruent angles. |
Scalene triangle? | - No equal sides. |
Pentagon? | - 5 sides and 5 angles |
Hexagon? | - 6 sides,6 angles |
Octagon? | - 8 sides, 8 angles |
Regular pentagon? | - all sides and all angles are congruent. |
Heptagon? | - 7 sides, 7 angles |
Square? | - all sides and all angles are congruent =360 degrees. |
Rectangle? | - all angles are congruent, 2 pairs of congruent sides. |
Quadrilateral? | - 4 sides and 4 angles. |
Parallelogram? | - 2 pairs of congruent sides and 2 pairs of congruent angles. |
Rhombus? | - 4 equal sides, 2 pairs of congruent angles. |
Angles? | 2 sides that share a common end point called the vertex. |
Right angle? | 90 degrees |
Straight angle? | Exactly 180 degrees. |
Acute angle? | 89 degrees or less. |
Obtuse angle? | Between 91 and 179 degrees. |
Reflex angle? | Larger than 180 less than 360 degrees. |
Complementary angles? | - two angles whose degrees equal exactly 90. |
Supplementary angles? | - two angles whose degrees are exactly 180. |
Adjacent angles? | - Share a common side. |
Vertical angles? | - formed by a pair of lines that intersect. |