This is what is called basic geometry, usually for 8th or 9th graders. When one is this age, there will be a text book that explains these things. I suggest you..look..it...up.
in triangle def side de equals 5 and angle d equals 55 find fe
It is an isosceles triangle because the third angle must measure 50 degrees
45 degree
Triangles measure 180 degrees. A triangle that has one 90 degree angle is known as a right triangle.
80 degrees(We're talking strictly about interior angles here.)
You can measure it. Or you can measure some other quantities (for examples, the lengths of the sides of a triangle), and calculate the angle using trigonometry.
67 degrees
37 degree
You cannot. An angle of a triangle can have any value between 0 and 180 degrees.
A degree is a measure of an angle (in geometry), a triangle is a 2-dimensional object. So the question makes no sense.
A right angle
in triangle def side de equals 5 and angle d equals 55 find fe
It is an isosceles triangle because the third angle must measure 50 degrees
100 degree, 40 degree and 40 degree.
45 degree
60º
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.