2. Find the lengths of the missing sides in these right-angled triangles. Give your answers in surd form. (i)
(ii) 20 cm 5 cm p 10 cm 6 cm (iv) 3 cm s
3. Find the value of x in these diagrams. Give your answers in surd form. (i)
(ii) x 5 x 10
4. Find the perimeter of triangle XYZ, given that |XZ| = 13 cm, |WZ| = 12 cm and |YW| = 16 cm.
1 3 4x Z 1 2x 10 15 cm (v) t 2 cm 8 cm √
_ 13 cm
u 5 cm (vi) q 3 cm r 9 cm (iii)
(iii)
X
W
5. Amy walks 8 km north, then 5 km west. What is the shortest distance back to her starting point? Give your answer correct to one decimal place. (Hint: Use a sketch.)
6. Penny constructed a triangle with side lengths of 17 cm, 21 cm and 30 cm. Showthat the triangle Penny constructed is not a right-angled triangle.
7. A 25 m ladder leans against a vertical wall. The bottom of the ladder is 20 m from the base of the wall.
If the bottom of the ladder is moved 13 m closer to the wall, how far does the top of the ladder move up the wall?