Find x. Leave answers in simplified radical form. (Step by step)
2 answers:
Solution:
<u>Step-1: Find the missing angle.</u>
- 90 + 45 + y = 180
- => 135 + y = 180
- => y = 180 - 135
- => y = 45°
<u>Step-2: Review the following.</u>
- This triangle is an isosceles right triangle because two angles are equivalent.
- Two sides of the triangle must equal 4 cm.
<u>Step-3: Use Pythagoras theorem.</u>
- x² = 4² + 4²
- => x² = 16 + 16
- => x = √32 ≈ 5.65 cm (Using calculator)
Answer:

Given:
- adjacent: 4 cm
- hypotenuse: x cm
- angle: 45°
<u>using cosine rule:</u>




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