Find the missing side length in the image attached.
2 answers:
Answer:
Step-by-step explanation:
→ We know that on the right side the length of the 2 sides is 18 and one of them is 10 so,
18 - 10 = 8cm is the length of the line above 10cm
→ Now we use scale factor enlargement, we can see that opposite 12 is 8 so the multiplier that was used to get from 12 to 8 is,
12 ÷ 8 = 1.5
→ Now we know the multiplier is 1.5 and we need to find the side opposite 10 so we multiply 1.5 by 10 to get,
1.5 × 10 = 15
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Answer:
31.7 cm²
Step-by-step explanation:
The area (A) of the triangle is calculated as
A = absinC
where a, b are the 2 sides given and C the angle between them
∠ C = 180° - (72 + 59)° = 180° - 131° = 49° , thus
A = 0.5 × 12 × 7 × sin49° ≈ 31.7 cm² ( to 1 dec. place )