The degree measure of 1 radian (taking π = (22 / 7))

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1. 57°61’22” (approx.)
2. 57°16’22” (approx.)
3. 57°22’16” (approx.)
4. 57°32’16” (approx.)

Using Rule 1,
π = radian = 180°

∴ 1 radian =	180°
	π

=	180 × 7°
	22

=		630	= 57	3	°
		11		11

= 57°		3	× 60" = 57°	180'
		11		11

= 57°16'	4	× 60" = 57°16'22"
	11