HPC 6.2 Law of Cosines Day 2

HPC 6.2 Law of Cosines Day 2

​Time to apply your knowledge

Fill in the Blanks

Multiple Select

How would you find the area of the following triangle?

• Multiply the sides together and divide by 2

• Use the law of cosines to find the smallest angle and then use that angle to find the altitude and then plug into the area formula for triangles

• Guestimate

• Write down a random number and go do more important stuff. It's all about getting the points for completion. I'll figure it out after Mr. D explains it. My time is too valuable to give this much thought, I mean, when am I really going to use this anyway?

Used to find the area of a triangle when you only know the side lengths.

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Heron's Formula

Fill in the Blanks

Fill in the Blanks

Multiple Choice

The sides of a triangle are 56 cm, 60 cm and 52 cm long. Then the area of the triangle is

• (a) 1322 cm²

• (b) 1311 cm²

• (c) 1344 cm²

• (d) 1392 cm²

Multiple Choice

Find the area of an equilateral triangle with side length of 8?

• 8

• 15.58

• 27.71

• 62.91

Multiple Choice

Find the area of the triangle with sides 45.9, 49.1, 41.5.

• 884

• 868

• 887

• 952

Day 2
Page 417
#19, 24, 34, 37, 39, 43, 47, 49, 50

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Homework