The ramp in the picture makes an angle of 73° with the doorpost. what is the measure of the angle ∠qpr, between the ramp and the ground? a) 17° b) 23° c) 27° d) 31°

A.  ∠ QPR = 17°

Step-by-step explanation:

From the given information, let QP be the length of the ramp.

Then, ∠ QPR is the angle between the ramp and the ground.

∠ PQR is the angle between the ramp and the doorpost and

∠ QRP is the angle between the doorpost and the ground.

Clearly, ∠ PQR = 73° (given)

∠ QRP = 90° (since doorpost and the ground are perpendicular to each other)

Now, use triangle sum propoerty of ΔQPR, we get,

∠ QPR + ∠ PQR + ∠ QRP = 180°

∠ QPR + 73 + 90 = 180°

∠ QPR + 163 = 180°

∠ QPR = 180 - 163

∠ QPR = 17°

what are the options? ?

step-by-step explanation:

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.