An acute triangle.
If you have one angle, you can draw two line segments that meet at that angle. Then, rotate your paper 180 degrees, and repeat, ensuring that the new lines are parallel to the existing ones, and eventually intersect them. You now have a parallelogram.
The sum of all angles in a triangle is 180 degrees. with 90 degrees (the right angle) spoken for, that leaves 45 degrees each for the remaining two angles.
acute
105 = 90 + 15 15 = 30/2 and 30 = 60/2 you can draw 90° Draw segment AB you can draw 90° at A by drawing perpendicular bisector at A draw equilateral triangle on left side of A will give you 60° bisect 60° twice to give 15° so total angle is 90 + 15 = 105°
draw the outside angle if you want to show 270 degrees then you draw a 90 degree angle but draw the circle outside of it
A right angle measures 90 degrees
to construct an angle of 20 degrees all you have to do is to trisect an angle of 60degrees
It's a reflex angle
An acute triangle.
use a protractor
A reflex angle is an angle greater than 180 degrees and less than 360 degrees. To construct one draw two lines at an angle and draw the angle measurement circle around the side you normally don't do it on.
draw 2 angles that add up to 180 degrees
An angle of 180 degrees is a straight line
obtuse* angles are between 180 degrees and 90 degrees. Straight line and right angle.
A protractor is used to draw a right angle of 90 degrees.
With a straight edge and a protractor