Ineed on number 17 and 18 on how to find the area of the figure

Step-by-step explanation:

17 ) Area of triangle = 1/2 × base × height

Area = 1/2 × 12 × 15

Area = 90 cm²

18 ) Area of trapezium = 1/2 (12 + 15.4) × 8

Area = 1/2 × 27.4 × 8

Area = 109.6 cm²

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

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step-by-step explanation: