Quadrilateral JKLM is a rhombus. If mangleLMK = 36, find mangleKJM

In the right triangle ABC, mangleB = 90, AB = 5, and AC= 12. Find BC. Round to the nearest tenth, if necessary.

Help?

Is AB a side and AC a side? I can't tell from your description which are sides and which is the hypotenuse.
But if you have two sides,
side1^2 + side2^2 = hypotenuse^2.

Post your work if you get stuck.

Okay, I have

AB^2 + BC^2 = AC^2
5^2+BC^2=12^2
23+BC^2=144
BC^2=119
BC=10.9

Is that correct?

If BC is the hypotenuse, AC is side 5 and you are looking for side BC, yes.
OR, you could have used trig to find the angle BAC from cos angle BAC = 5/12, then sin angle BAC = side BC/12.

using a protactor to measuer the angle. tell wheter the angle is acute obtuce right or srait

what is a acute angle a obtuse angle and a reflex angle ?

abc'

An acute angle is an angle that measures less than 90 degrees. It is "sharp" or "pointed".

An obtuse angle is an angle that measures between 90 and 180 degrees. It is "blunt" or "larger than a right angle".

A reflex angle is an angle that measures between 180 and 360 degrees. It is "bent" or "larger than a straight angle".

To determine whether an angle is acute, obtuse, right, or straight, you can use a protractor to measure the angle, as you mentioned. Compare the measurement you obtain to the range of measurements for each type of angle. If the measurement is less than 90 degrees, it is acute; if it is between 90 and 180 degrees, it is obtuse; if it is exactly 90 degrees, it is right; and if it is exactly 180 degrees, it is straight.