Construct an equilateral triangle, given its side and justify the construction.

5

(a)

Construct an equilateral triangle with one side 6 cm.

5

(a)

Draw an angle of 40° with a protractor and then construct an angle 80° using ruler and compass.

5

(a)

(i) Construct a triangle ABC in which BC = 5 cm, ㄥB = 45°and AB - AC= 2.8cm.
(ii) Measure AB.
(iii) Measure AC
(iv) Verify that AB - AC = 2.8 cm.
(v)Hari comments that ㄥACB = 112°. Is he true? Which value is depicted by comment of Hari?

5

(a)

(i) Construct a triangle PQR with base PQ = 8.4 cm, LP = 45° and PR - QR = 2.8 cm.
(ii) Measure PR.
(iii) Measure QR.
(iv) Verify that PR - QR = 2.8 cm.
(v) Gaffar says that L PQR = 85°. Is he correct? Which value is depicted by his statement?

5

(a)