Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.

Lesson: Finding the Area of a Triangle Using Sine

In this lesson, we will learn how to find the area of a triangle without having to calculate its perpendicular height.

Question Video: Using Trigonometric Formula for Area of Triangle to Find the Area of a Triangle

01:36

Worksheet: Finding the Area of a Triangle Using Sine • 10 Questions

Q1:

Which of the following is a formula that can be used to find the area of a triangle?

A
B
C
D
E

Q2:

Benjamin’s house is on a corner lot. Find the area of the front yard given that the edges measure 40 ft and 56 ft, as shown in the diagram.

Q3:

is a triangle where , , and . Find the area of the triangle giving the answer to two decimal places.

Preview

Related Lessons

Law of Cosines

• 1 Video • 1 Worksheet • 14 Questions
Law of Sines

• 1 Video • 1 Worksheet • 16 Questions
Graphs of Sine and Cosine

• 1 Video • 1 Worksheet • 14 Questions

Related Videos

Using the Law of Cosines to Calculate the Unknown Length of a Triangle

Alex Cutbill
Using the Law of Sines to Calculate an Unknown Length

Alex Cutbill
Figuring Out the Rule of a Trigonometric Function from Its Graph

Alex Cutbill

Related Worksheets

Law of Cosines

• 14 Questions
Law of Sines

• 16 Questions
Graphs of Sine and Cosine

• 14 Questions