Jawaban:

a. - x = 15 cm

- y = 17 cm

b. - x = 8 cm

- y = 4√5 cm

c. - x = 13 cm

- y = 11 cm

d. - x = 40 cm

- y = 50 cm

e. - x = 8√10 cm

- y = 7 cm

f. - x = 6 cm

- y = 4,8 cm

Penyelesaian dengan cara:

a. • x = √12²+9

= √144+81 = √225 = 15 cm

• y = √15²+8² = √225+64 = √289 = 17 cm

b. • x = √10²–6² = √100–36 = √64 = 8 cm

• y²=12²–8²

y²=144–64

y²=80

y =√80

y =√16×5 = y=4√5 cm

c. • x = √12²+5² = √144+25 = √169 = 13 cm

• y+5=√20²–12²

y+5=√400–144

y+5=√256

y+5=16

y =16–5

y = 11 cm

d. • x = √41²–9² = √1.681–81 = √1.600 = 40 cm

• y = √40²+30² = √1.600+900 = √2.500 = 50 cm

e. • x² = 26²–6²

x² = 676 – 36

x² = 640

x = √640

x = √64×10

x = 8√10 cm

• y = 7 cm

f. • x = √10²–8² = √100–64 = √36 = 6 cm

• L∆ = ½ × a × t

= ½ × 6 × 8

L∆ = 24

½ × 10 × y = 24

5y = 24

y = 24/5

y = 4,8 cm