UNIT 6: TRIANGLES

1. EQUILATERAL TRIANGLE (l = 5 cm.)

STEPS:

1. Draw a side.
2. Center your compass in point A and open it to point B, draw an arc.
3. Now center the compass at the point B and open it to point A, draw an arc.
4. Mark the arc intersection point C.
5. Join point A with point C and do the same with point B so you get triangle.

2. ISOSCELES TRIANGLE (a = b = 4,5 cm., c = 3,5 cm.)

STEPS:

1. Draw the different side.
2. Measure the equal side with your compass (4,5 cm.).
3. With this measure draw an arc centering your compass in point A.
4. With the same measure draw another arc centering your compass in point B.
5. Mark the arc intersection point C.
6. Join point A with point C and do the same with point B so you get triangle.

3. SCALENE TRIANGLE (a = 7 cm., b = 4,5 cm., c = 5,5 cm.)

STEPS:

1. Draw a side, for example side a = 7 cm.
2. Measure another side with your compass, for example b = 4,5 cm.
3. With this measure draw an arc centering your compass in point C.
4. Measure the last side with your compass, c = 5,5 cm.
5. With this measure draw an arc centering your compass in point B.
6. Mark the arc intersection point A.
7. Join point A with point C and do the same with point B so you get triangle.

4. RIGHT TRIANGLE (a = 6 (Hypotenuse), b = 3 cm.)

STEPS:

1. Draw the side b = 3 cm.
2. Draw a perpendicular line from point A.
3. Measure side a with your compass, a = 6 cm.
4. With this measure draw an arc centering your compass in point C.
5. Where this arc crosses the perpendicular line to point A we get point B.
6. Join point B with point C so you get triangle.

Practice triangles:

Here you can download a .pdf and then print in a DIN-A4, to practice triangles exercises.
PRACTICE_TRIANGLES