Jawab:

1

a. rumus pencerminan terhadap sumbu X

(x,y)--------------> (x,-y)

A (2,5)-----------> A' (2,-5)

B(-3,6)-----------> B' (-3,-6)

b. Garis Y=6

Rumusnya

(x,y)---------->(x,2h-y)

A (2,5)----> A' (2, 2(6)-5)-------> A' (2,7)

B (-3,6)-----> A' (-3, 2(6)-6)---------> A' (-3,6)

c. y=x

Rumusnya

(x,y)----> (y,x)

A(2,5)----> A' (5,2)

B(-3,6)---> B' (6,-3)

D. titik (4,4)

Rumus (x,y)---> (2a-x,2b,y)

A(2,5)----> A' (2(4)-2, 2(4)-5) ---> A' (6,3)

B (-3,6)----> B' (2(4)-(-3) , 2(4)-6)------->BA' (11, 2)

2.

a. SUMBU Y

Rumus (x,y)----> (-x,y)

P (7,-8)----------> P' (-7,-8)

Q (-4,-3)--------> Q' (4,-3)

b. Garis x=-2

Rumus (x,y)--> (2h-x,y)

P (7,-8)----------> P' (2(-2)-7, -8)---------> (-11,-8)

Q (-4,-3)--------> Q' (2(-2)-(-4) ,-3)--------> (0,-3)

c. Garis y=-x

(x,y)-----> (-y,-x)

P (7,-8)----------> P' (8,-7)

Q (-4,-3)--------> Q' (3,4)

d. Titik (0,0)

(x,y)---> (-x,-y)

P (7,-8)----------> P' (-7,8)

Q (-4,-3)--------> Q' (4,3)