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3 years ago

Use the figure below to find the distance across the river (IK)

Mathematics

1 answer:

Black_prince [1.1K]3 years ago

3 0

Step-by-step explanation:

ΔJLK = ΔNLM ( vertically opposite Δ)

ΔJKL = ΔNML ( each 90° )

so,

triangle JKL = triangle NML (by AA similarity)

JK / KL = NM / ML

JK / 21m = 42m / 49m

JK = 42 × 21 ÷ 49

JK = 18m

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