Home
Grade 1Grade 2Grade 3Grade 4Grade 5Grade 6Grade 7Grade 8Grade 9Grade 10Math Themes
Explorers (Grades 1-3)Explorers Elite (1-3)Navigators (Grades 4-6)Navigators Elite (4-6)Challengers (Grades 7-9)Challengers Elite (7-9)Schedule an Evaluation
Mobius MethodFlexible ClassesCompanySupport
Pricing
Sign InJoin

Area of a triangle from surrounding rectangle

Teaching Transcript

🎙️

Let's find the area of this triangle

One way to think about it is to draw a 6 by 5 rectangle around the triangle with an area of 30

The triangle fills half the rectangle, so an area of 15

This math skill teaches how to calculate the area of a triangle by envisioning it within a surrounding rectangle. The triangle's area is deduced by determining that it occupies half the area of the rectangle.

Skill Practice

Area of a triangle from surrounding rectangle

Test your understanding of area of a triangle from surrounding rectangle by practicing it! Work through the below exercises to use it in practice.