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1.03 Special right triangles and exact value trigonometric ratios

Interactive practice questions

Consider the triangle below.

A right-angled triangle with sides labeled a, b, and c. The right angle, as indicated by a small square is at the vertex opposite side c, which is the hypotenuse. The angles at the vertices opposite sides a and b are marked with arcs and labeled 45 degrees each.

a

Complete the table of values by entering the corresponding values for $b$b and $c$c, given particular values of $a$a.

$a$a $b$b $c$c
$1$1 $\editable{}$ $\editable{}$
$2$2 $\editable{}$ $\editable{}$
$3$3 $\editable{}$ $\editable{}$
b

Suppose that $a$a has a length of $x$x units. What is the length of $b$b in terms of $x$x?

c

Suppose that $a$a has a length of $x$x units. What is the length of $c$c in terms of $x$x?

d

Therefore, which two of the following statements are true for any isosceles right triangle?

The two shortest sides have the same length.

A

The length of the hypotenuse is $\sqrt{2}$2 times larger than either of the other side lengths.

B

Any two sides have the same length.

C

The length of the hypotenuse is the square root of the sum of the other side lengths.

D
Easy
4min

Consider the triangle below.

Easy
1min

Consider the triangle below.

Easy
< 1min

Consider the triangle below.

Easy
< 1min
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Outcomes

T.1

Given a point on the terminal side of an angle in standard position, or the value of the trigonometric function of the angle, determine the sine, cosine, tangent, cotangent, secant, and cosecant of the angle

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