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Special Right Triangles and Trigonometry
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Gravity
Unit 8 Vocabulary
Terms in this set (20)
opposite leg
the leg located opposite an angle of reference in a right triangle
adjacent leg
the leg located next to an angle of reference in a right triangle
SOHCAHTOA
a mnemonic (memory) device that is used to remember the 3 basic trigonometric ratios
sine (SIN)
the opposite/hypotenuse ratio
cosine (COS)
the adjacent/hypotenuse ratio
tangent (TAN)
the opposite/adjacent ratio
angle of elevation
the angle formed looking up to an object from the horizontal line
angle of depression
the angle formed looking down to an object from the horizontal line
1. hypotenuse
1. the side located opposite the right angle
Trigonometric Ratio
the generality of a ratio of two sides of a right triangle
Special Right Triangles (SRT)
The right triangles whose angles measure 45, 45, 90 or 30, 60, 90 degrees.
Right Triangle
A triangle that has a 90 degree angle.
Equilateral Triangle
A triangle with three equal sides
Isosceles Right Triangle
the technical name of a triangle with 45: 45: 90 degrees
30-60-90 Scalene Right Triangle
the name of a triangle with 30: 60: 90 degrees
45-45-90
the hypotenuse is equal to the leg time the square root 2 of this numbered special right triangle
2. Hypotenuse
2. the longest side of a right triangle
Pythagorean Theorem
a² + b² = c²
Inverse SOHCAHTOA
The type of trig function in order to find the angle measure when given two sides of a right triangle
Long Leg
The side of a 30-60-90 triangle which equals the Short leg x sq rt 3
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