1 answer

How do you convert -220 degrees to radians without a calculator?

Question:

How do you convert -220 degrees to radians without a calculator?

Answers

You probably know that #180°# corresponds to #pi# radians;
You can build the proportion:
#180°:pi=()°:(rad)#
Set #()°=-220°# and solve for #(rad)#;
you'll get:
#(rad)=-220°pi/(180°)=-22°pi/(18°)=-11/9pi#

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