Drawing Triangles With Given Coordinates

Determine the correct algebraic representation of the similar figures shown.

• (x, y) -> (2x, 2y)

• (x, y) -> (.5x, .5y)

• (x, y) -> (x, 2y)

• (x, y) -> (.5x, y)

The coordinates of the vertices of △JKL are J(-7, 3), K(−8, 7), and L(-2, 6). The coordinates of the vertices of △J′K′L′ are J′(−7, -3), K′(-8, -7), and L′(−2, -6).

• △JKL is congruent to △J′K′L′ because you can map △JKL to △J′K′L′ using a reflection across the x-axis, which is a rigid motion.

• △JKL is congruent to △J′K′L′ because you can map △JKL to △J′K′L′ using a reflection across the y-axis, which is a rigid motion.

• • 
    △JKL is congruent to △J′K′L′ because you can map △JKL to △J′K′L′ using a translation 2 units down, which is a rigid motion.

• △JKL is not congruent to △J′K′L′ because there is no sequence of rigid motions that maps △JKL to △J′K′L′.

Determine the correct algebraic representation of the similar figures

• (x, y) -> (.5x, .5y)

• (x, y) -> (2x, 2y)

• (x, y) -> (x + 2, y + 2)

• (x, y) -> (x - .5, y - .5)

Find the area of the given figure, to the nearest tenth.

• 9 square units

• 14.6 square units

• 18 square units

• 14.7 square units

• Choice (1)
• Choice (2)
• Choice (3)
• Choice (4)

The triangle has vertices at (-2,3),(-2,-2),and (4,2).  What is the area of the triangle?  Round your answer to the nearest hundredth.

• 30

• 22.45

• 20

• 15

• 1

• 2

• 3

• 4

FInd the area of the triangle

• 24.2 units

• 5 square units

• 10 square units

• 30 units

Find the area of triangle ELI where E=(2, 11), L=(7, 1) and I=(2, 1)

• A

• B

• C

• D