Atriangle has the side lengths of 12 cm, 15 cm, and 20 cm. classify it as acute, obtuse, or right.
a) acute
b) obtuse
c) right
d) there is not enough information

Obtuse  

Step-by-step explanation:

Plugging the numbers into the Pythagorean Theorem (a^2 + b^2 = c ^2)

20^2 = 12^2 + 15^2

400 > 144 + 225

400 > 369

Because of the Converse of the Pythagorean Theorem, which tells us if c is greater than a+b, it is obtuse

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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sine

step-by-step explanation: