What can’t talk but will reply when spoken to?

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.