Find the area of a triangle ABD. a) AB = 6m, AD = 4m 15cm. b) AB = 8 DM 6 cm, AD = 11 DM 7 cm

1. Let’s translate m and dm into cm, knowing that in 1 m = 100 cm, 1 dm = 10 cm:

a) AB = 6 m = 600 cm;

AD = 4m 15cm = 415cm;

b) AB = 8 dm 6 cm = 86 cm;

AD = 11m 7cm = 117cm;

2. Find the area of a right-angled triangle by the formula:

S = 1 / 2ab, where a and b are sides of the triangle, respectively.

Then S1 = 1/2 * 600 * 415 = 124500 cm²;

S2 = 1/2 * 86 * 117 = 5031 cm².

Answer: S1 = 124500 cm², S2 = 5031 cm².