Right+Triangles

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 Lesson 1-

Perfect Square: A perfect square is the square of an integer.

Square Root: The square root of a given number is a number that when multiplied by itself equals the given number.

Irrational: An irrational number is a number that can be represented by a nonrepeating, nonterminating decimal.

Lesson 2-

Legs: The legs of a right triangle are the two shorter sides of the triangle.

Hypotenuse: In a right triangle, the hypotenuse is the longest side, which is opposite the right angle.

Lesson 3-

Distance: The distance //d// between any two points (x 1, y 1 ) and (x 2 , y 2 )

Midpoint: The midpoint of a line segment with endpoints //A//(x 1, y 1 ) and //B//(x 2 , y 2 )

Lesson 4-

No Vocabulary words in this lesson.

Lesson 5-

No Vocabulary words in this lesson.

Lesson 6-

Trigonometry: Trigonometry is a branch of mathematics involving triangle measurement.

Trigonometric ratio: Trigonometric ratios are the sine, cosine, and tangent.

Sine: The sine of an acute angle is the ratio of the length of the leg of a right triangle opposite the acute angle to the length of the hypotenuse.

Cosine: The cosine of an acute angle is the ratio of the length of the leg of a right triangle adjacent to the acute angle to the length of the hypotenuse.

Tangent: The tangent of an acute angle is the ratio of the length of the leg of a right triangle opposite the acute angle to the length of the leg adjacent to the angle.

Lesson 7-

Angle of Elevation: An angle of elevation is an angle formed by a horizontal line and a line of sight below it.

Angle of Depression: An angle of depression is an angle formed by a horizontal line and a line of sight below it.