Answer:
![\boxed {\boxed {\sf 24 \ yards}}](https://img.qammunity.org/2022/formulas/mathematics/high-school/8l9ahlnyvpemhhuzqevh9lznuegydph1tq.png)
Explanation:
The formula for a triangle's area is:
![a= (1)/(2) bh](https://img.qammunity.org/2022/formulas/mathematics/high-school/i4pn1cjgdet8kkg3ition3iv7sqbdog5su.png)
We know the area is 36 square yards and the base is 3 yards.
![a= 36 \ yd^2 \\b= 3 \ yd](https://img.qammunity.org/2022/formulas/mathematics/high-school/umv6yrkcxdlxza2m2ln149vci4fdxjgfq5.png)
Substitute the values into the formula.
![36 \ yd^2 = (1)/(2) (3 \ yd )h](https://img.qammunity.org/2022/formulas/mathematics/high-school/wnlqwt9mh1cvr6mcfi1a28ytqlx061p3t4.png)
Divide by 1/2 or multiply both sides by 2.
![2 * 36 \ yd^2 = (1)/(2) (3 \ yd )h *2](https://img.qammunity.org/2022/formulas/mathematics/high-school/ag237bebe283q6en4t1rcwxd1zu6si0uax.png)
![72 \ yd^2= (3 \ yd)h](https://img.qammunity.org/2022/formulas/mathematics/high-school/e5eiyvwi8big2kflv86i7cmwppppze748w.png)
We are trying to solve for the height, so we must isolate that variable. h is being multiplied by 3. The inverse of multiplication is division, so we must divide both sides by 3 yd.
![\frac {72 \ yd^2}{3 \ yd}= ((3 yd) h)/(3 \ yd)](https://img.qammunity.org/2022/formulas/mathematics/high-school/pxceiet6ottinaemzi6n5l7vq6q9zvf213.png)
![24 \ yd =h](https://img.qammunity.org/2022/formulas/mathematics/high-school/85rbe7l59soj9tjh14r526vg8z56r6c3rt.png)
The height of the triangle is 24 yards.