Page 158 - New Medley 5 Semester 2

E. 1. Draw rough sketch of each of the seven types of triangles.

2. Can a right-angled triangle be an equilateral triangle?

Properties of Triangles

Activity: Construct any three triangles. Measure their angles and record

the reading under Table I. Find the sum of angles.

1. A 2. A 3. A

C B C B C
B

Table I

Measure of angles
Triangles Sum of angles (A + B + C)
A B C

1.

2.

3.

What do you observe?

Now, measure the length of each side in each of the three triangles. Note

down your reading under the Table II.

Table II

Measure of sides Is Is Is
Triangles
AB BC AC AB + BC > AC? BC + AC > AB? AC + AB > BC?

1.

2.

3.

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