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# ← Geometry Chapter 7 Right Triangles FlashcardsTest

### Question Limit

of 15 available terms

## Geometry Chapter 7 Right Triangles Flashcards

### 5 Multiple Choice Questions

1. In a triangle with shorter sides a and b and longer side c, if a^2 + b^2 < c^2, then the triangle is obtuse
2. trigonometric ratio: abbreviation cos; the cosine of an acute angle in a right triangle equals the side adjacent to the angle divided by the hypotenuse (cos A = adj/hyp)
3. In a triangle with shorter sides a and b and longer side c, if a^2 + b^2 > c^2, then the triangle is acute
4. Special right triangle: hypotenuse = shorter side 2; longer side = shorter side sqrt(3)
5. The angle formed when looking up from the horizontal

### 5 True/False Questions

1. Pythagorean TripleIn a right triangle with legs a and b and hypotenuse c, a^2 + b^2 = c^2

2. trigonometric ratiosGives 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.

3. Solve a triangleIn a triangle with shorter sides a and b and longer side c, if a^2 + b^2 < c^2, then the triangle is obtuse

4. SOH CAH TOAMnemonic device to help remember the trig ratios in a right triangle: sin = opp/hyp; cos = adj/hyp; tan = opp/adj

5. Pythagorean TheoremThree positive integers that satisfy a^2 + b^2 = c^2, that is, they could be the three side lengths of a right triangle. Primitive triples include: 3, 4, 5; 5, 12, 13, and 8, 15, 17. More triples can be formed by multiplying each member of a primitive triple by the same multiplier; for example, since 3, 4, 5 is a triple, so is 6, 8, 10.