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Trigonometric Ratios worksheet with labeled right triangles for identifying sides relative to angle θ.

Worksheet titled "Trigonometric Ratios" with five right triangles labeled with angles and side lengths, asking students to identify opposite, adjacent, and hypotenuse sides.

Worksheet titled "Trigonometric Ratios" with five right triangles labeled with angles and side lengths, asking students to identify opposite, adjacent, and hypotenuse sides.

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Show Answer Key & Explanations Step-by-step solution for: Identify the sides of the right triangle
Let’s solve each problem step by step, using the definitions of opposite leg, adjacent leg, and hypotenuse in a right triangle relative to angle θ.

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🔑 Key Definitions:


- Hypotenuse: The side *opposite the right angle* — always the longest side.
- Opposite leg: The side *opposite* angle θ (not touching θ).
- Adjacent leg: The side *next to* angle θ that is *not* the hypotenuse.

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## Problem 1)

Triangle: Right angle at X. Angle θ at Y.

- Leg opposite to θ: The side *across from* angle Y → that’s XZ
- Leg adjacent to θ: The side *next to* angle Y that’s not hypotenuse → that’s XY
- Hypotenuse: Side opposite right angle (at X) → that’s YZ

> ✔️ Answers:
> - Opposite: XZ
> - Adjacent: XY
> - Hypotenuse: YZ

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## Problem 2)

Triangle: Right angle at V. Angle θ at U.

- Opposite to θ (U): Side across from U → VW
- Adjacent to θ (U): Side next to U, not hypotenuse → UV
- Hypotenuse: Opposite right angle (at V) → UW

> ✔️ Answers:
> - Opposite: VW
> - Adjacent: UV
> - Hypotenuse: UW

---

## Problem 3)

Triangle: Right angle at S. Angle θ at R.

- Opposite to θ (R): Side across from R → ST
- Adjacent to θ (R): Side next to R, not hypotenuse → RS
- Hypotenuse: Opposite right angle (at S) → RT

> ✔️ Answers:
> - Opposite: ST
> - Adjacent: RS
> - Hypotenuse: RT

---

## Problem 4)

Triangle ABC: Right angle at B. Angle θ at A.

Sides given: AB = 35, BC = 12, AC = 37

- Opposite leg to θ (A): Side across from A → BC = 12
- Adjacent leg to θ (A): Side next to A, not hypotenuse → AB = 35
- Hypotenuse: Opposite right angle (B) → AC = 37

> ✔️ Answers:
> - Opposite: 12
> - Adjacent: 35
> - Hypotenuse: 37

---

## Problem 5)

Triangle LMN: Right angle at M. Angle θ at L.

Sides given: LM = 15, MN = 8, LN = 17

- Opposite leg to θ (L): Side across from L → MN = 8
- Adjacent leg to θ (L): Side next to L, not hypotenuse → LM = 15
- Hypotenuse: Opposite right angle (M) → LN = 17

> ✔️ Answers:
> - Opposite: 8
> - Adjacent: 15
> - Hypotenuse: 17

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## 📝 Final Answer Summary:

1)


- Opposite: XZ
- Adjacent: XY
- Hypotenuse: YZ

2)


- Opposite: VW
- Adjacent: UV
- Hypotenuse: UW

3)


- Opposite: ST
- Adjacent: RS
- Hypotenuse: RT

4)


- Opposite: 12
- Adjacent: 35
- Hypotenuse: 37

5)


- Opposite: 8
- Adjacent: 15
- Hypotenuse: 17

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All answers are based on standard trigonometric definitions in right triangles. Always identify the right angle first, then locate angle θ, and apply “opposite”, “adjacent”, and “hypotenuse” accordingly.
Parent Tip: Review the logic above to help your child master the concept of is it a right triangle worksheet.
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