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Grade 9 Finding Unknown Sides in a Right Triangle

Uses the Pythagorean Theorem and Trigomometry Functions.

AB
Pythagorean Theorema^2 + b^2 = c^2
180 degreessum of the angles in a triangle
360sum of the angles in a quadrilateral
opposite/hypotenusesine ratio
adjacent/hypotenusecosine ratio
opposite/adjacenttangent ratio
45 degreesWhat other acute angle will you find in a right triangle with a 45 degree angle?
67 degreesWhat other acute angle will you find in a right triangle with a 23 degree angle?
7 degreesWhat other acute angle will you find in a right triangle with a 83 degree angle?
60 degreesWhat is the size of an angle in a equilateral triangle?


Mr. Reed

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