You can use a protractor!
Draw the baseline and measure the angles and mark them. Then finally join them together!
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1. A given length of line is drawn from points A to B. 2. A compass is used to measure the line and construct an equalateral triangle using line A to B as the base side of the triangle. 3. Use the compass to bisect the two adjacent ventexs at the base of the triangle extending these lines till they intersect finding the center, point O, of the triangle. 4.Draw the solution finding line parallel to A to B through point O. Extend this line to intersect with the sides of the triangle at points C and D. 5. One third of line A to B is equal to line section A to C and line section B to D.
Construct 2 perpendicular lines which will meet at 90 degrees then by bisecting this angle wll give a 45 degree angle
First draw a circle. Keeping the compass at the same angle; from any point on the circle's edge, draw another arc that intersects the circle's edge and (should) go through the centre as well. Repeat these arcs until you get back to the start. Using a ruler, connect the six intersect points on the edge of the circle and erase the construction lines.
by using a ruler and a compass
Most often, a construction in math is when you are asked to construct a geometric object, such as an equilateral triangle, using tools such as a compass and a ruler.
With the ruler and compass construct a right angle isosceles triangle with a base of 9 cm At 4 cm from the LHS or RHS of the base draw a line that meets the apex of the triangle The angle of this line will be 40 degrees because each 1 cm of base space represents 10 degrees when joined to the apex
Geometric figures can be drawn using a compass and a straight edge. This is commonly known as ruler and compass construction.
Check on youtube!
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You cannot, you must use a protractor.
use trisection method
It is possible to construct a 20 degree angle using only Ruler and Compass. I happened to stumble across a method that is highly accurate. It is posted on my blog. Check the related link
first draw a ray .
Draw a circle using a compass. Then, without changing the compass setting, place its point on the circumference of the circle, at any point A, and draw two arcs to intersect the circumference at B and C. Move the compass to B and draw another arc to intersect the circumference at D; and then from C to E. ADE will be an inscribed equilateral triangle.
An isosceles triangle has 3 sides and 2 of its sides are of equal length which can be constructed by using a straight edge and a compass.