← Geometry Chapter 7 Right Triangles Flashcards Test
5 Written Questions
5 Multiple Choice Questions
 Means finding any missing angles and/or sides in a triangle. Methods to solve a right triangle include the Pythagorean theorem, triangle sum theorem (if given one acute angle in a right triangle, we can find the other by subtracting the acute angle's measure from 90), trig ratios, and inverse trig functions
 Special right triangle: isosceles right triangle where the legs are congruent and the hypotenuse = leg * sqrt(2)
 trigonometric ratio: abbreviation sin; the sine of an acute angle in a right triangle equals the side opposite the angle divided by the hypotenuse (sin A = opp/hyp)
 The angle formed when looking up from the horizontal
 Gives us the measure of the angle whose sin/cos/tan is a given ratio value. "Undoes" sin, cos, or tan. Written using a "1" (looks like an exponent, but isn't). Also called "arc," such as arcsin, arccos, arctan. Example: arcsin(1/2) = 30 degrees. Useful in finding missing angle values in right triangles.
5 True/False Questions

trigonometric ratios → Ratios formed by the sides of a right triangle. Useful in finding the missing sides of a right triangle given an angle and a side. Trigonometric ratios include sine (sin), cosine (cos), and tangent (tan). Other ratios (not covered in this chapter) are: cosecant, secant, and cotangent

Pythagorean Triple → In a right triangle with legs a and b and hypotenuse c, a^2 + b^2 = c^2

SOH CAH TOA → Mnemonic device to help remember the trig ratios in a right triangle: sin = opp/hyp; cos = adj/hyp; tan = opp/adj

306090 right triangle → Special right triangle: isosceles right triangle where the legs are congruent and the hypotenuse = leg * sqrt(2)

Pythagorean Theorem → In a right triangle with legs a and b and hypotenuse c, a^2 + b^2 = c^2