Readers ask: How To Draw A Triangle?


How do you draw a triangle step by step?

Constructing triangles

  1. Draw one side of the triangle using a ruler. It is often easier to start with the longest side.
  2. Set the compass width to 5 cm. Draw an arc 5 cm away from point A.
  3. Set the compass width to 3 cm.
  4. Use your ruler to join points A and B to the point where the arcs intersect (C).

How do you draw a perfect triangle?

Rotate the ruler until the mark representing the length of the base line touches the perpendicular bisector. If it cannot touch, extend the bisector. Draw the line, then repeat this process to draw the third line. You now have a triangle with three congruent sides and three congruent angles, or an equilateral triangle.

How do you draw a triangle with 3 sides?


  1. Step 1: Draw a line segment BC = 6cm.
  2. Step 2: With ‘B’ as centre, draw an arc of radius 4 cm above the line BC.
  3. Step 3: With ‘C’ as center, draw an arc of 5 cm to intersect the previous arc at ‘A’
  4. Step 4: Join AB and AC.
  5. Step 1:
  6. Step 2:
  7. Step 3:
  8. Step 4:
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How do you create an ABC triangle?


  1. Step 1: Draw a line, AB, 9 cm long.
  2. Step 2: Mark an angle of 70º by placing the centre of the protractor at the point A.
  3. Step 3: Join the 70º mark and the point A. Extend the arm AC until it is 7 cm long.
  4. Step 4: Join the points B and C to obtain the required triangle ABC.

What is the triangle shape?

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted. In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane (i.e. a two-dimensional Euclidean space).

Can you draw a triangle which has?

Hence, no such triangle is possible. (c) Yes, a triangle with three lines of symmetry is possible: And it is an equilateral triangle, shown below in the figure.

At what age can you draw a triangle?

Finally, they can put it all together to make a triangle at five years old. A diamond shape is closer to six years old. It is really easy to teach writing shapes, especially to preschoolers or even younger.

How do you draw a SSS triangle?

Constructing triangles given SSS

  1. Draw the longest side using a ruler.
  2. Open the pair of compasses until they are 5 cm wide. Use a ruler to measure it. Draw an arc from point H above the line.
  3. Open the pair of compasses until they are 3 cm wide. Use a ruler to measure it.
  4. Join the arc to the points H and J using a ruler.
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How do you draw a triangle in geometry?

First draw any line, then draw a line segment perpendicular to the first line. On that line segment, measure off the given line length. At the end of the line segment, use a protractor to form 30° angles on either side of the line segment. Extend the new lines to intersect the first line you drew.

How do you draw a triangle without a protractor?

Bisecting angles without a protractor

  1. Place the compass on the vertex of the angle (point B). Draw an arc across each arm of the angle.
  2. Place the compass on the point where one arc crosses an arm and draw an arc inside the angle.
  3. Use a ruler to join the vertex to the point where the arcs intersect (D).

What are the triangle protractor called?

The simplest form of set square is a triangular piece of transparent plastic (or formerly of polished wood) with the centre removed. More commonly the set square bears the markings of a ruler and a half circle protractor. The outer edges are typically bevelled.

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