It depends on what measure is missing.
Measure it with a ruler.
You can measure it with a ruler.
If it has no right angles, it is not a right triangle and therefore you cannot name a hypotenuse of that triangle. Which implies you cannot find that side's measure.
If the triangle is equilateral, you don't have a problem, but if not you have to measure the sides.
It depends on what measure is missing.
To find the height of a triangle you measure it. It has to be from the middle of the base to the top point.
Measure it!
Measure it with a ruler.
You can measure it with a ruler.
If it has no right angles, it is not a right triangle and therefore you cannot name a hypotenuse of that triangle. Which implies you cannot find that side's measure.
If the triangle is equilateral, you don't have a problem, but if not you have to measure the sides.
how to find the measure of angle C in the following triangle
the Pythagorean theory
You can find it by using the Pythagorean theorem if you know the side and the base of triangle. In an isosceles triangle the median is also the altitude. The formula is: (The measure of the side length)^2 - (The measure of the one half of the base length )^2 = (The measure of the altitude)^2. Find the square root of the result that you'll have the measure of the altitude.
If it has no right angles, it is not a right triangle and therefore you cannot name a hypotenuse of that triangle. Which implies you cannot find that side's measure.
To find the degree of angle of a side of a triangle, a protractor is needed to measure the angle. Place the '0' on the protractor on the point of the angle and look at the top part to determine degree of angle. To measure the length of a triangle side, a simple ruler can be used to measure the length.