Please answer it now in two minutes

Step-by-step explanation:

there are two ways you can answer this question . the first is you can use tan inverse or calculate the value of hypotenuse using Pythagorean thereom and use sin inverse

1 a*a + b*b = c*c. Pythagorean theroem

2. 6*6 +3*3 = c*c

36+9= c*c

√45 =c or. 3√5 ( when simplified)

sin <R =OPPOSITE

HYPOTENUSE

sin <R = 6/3√5

sin <R= 0.89

<R= sin-1(0.89)

<R= 63°

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

35%

step-by-step explanation: