The radius of a semi circle is 21 cm. Find perimeter of semicircle<\/p>\n\n\n\n
The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n The radius of the semicircle is given as 21 cm. To find the perimeter of the semicircle, it is important to understand what the perimeter includes.<\/p>\n\n\n\n A semicircle is half of a full circle. Its perimeter consists of two parts:<\/p>\n\n\n\n First, recall the formula for the circumference of a full circle: For a semicircle, the curved part is half the circumference: Next, the straight edge of the semicircle is the diameter: Now, to find the total perimeter (P) of the semicircle, add the curved length and the diameter: Given the radius is 21 cm, substitute the value into the formula: Using the value of \u03c0 \u2248 3.1416: Rounded to two decimal places, the perimeter is approximately: In conclusion, the perimeter of the semicircle with radius 21 cm is about 107.97 cm.<\/p>\n\n\n\n The perimeter of a semicircle is not just the half-circle curved edge but also includes the straight line connecting the endpoints of the curve, which is the diameter. The curved edge length comes from half the circumference because the semicircle is exactly half a circle. Adding the diameter completes the perimeter since the boundary of the semicircle is composed of these two parts. Substituting the given radius and using the value of \u03c0 allows calculation of the numeric perimeter. This formula applies to any semicircle as long as the radius is known.<\/p>\n","protected":false},"excerpt":{"rendered":" The radius of a semi circle is 21 cm. Find perimeter of semicircle The correct answer and explanation is: The radius of the semicircle is given as 21 cm. To find the perimeter of the semicircle, it is important to understand what the perimeter includes. A semicircle is half of a full circle. Its perimeter […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29237","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/29237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=29237"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/29237\/revisions"}],"predecessor-version":[{"id":29238,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/29237\/revisions\/29238"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=29237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=29237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=29237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
Circumference = 2 \u00d7 \u03c0 \u00d7 radius<\/p>\n\n\n\n
Curved length = (1\/2) \u00d7 2 \u00d7 \u03c0 \u00d7 radius = \u03c0 \u00d7 radius<\/p>\n\n\n\n
Diameter = 2 \u00d7 radius<\/p>\n\n\n\n
P = \u03c0 \u00d7 radius + 2 \u00d7 radius<\/p>\n\n\n\n
P = \u03c0 \u00d7 21 + 2 \u00d7 21<\/p>\n\n\n\n
P = 3.1416 \u00d7 21 + 42
P = 65.9736 + 42
P = 107.9736 cm<\/p>\n\n\n\n
P \u2248 107.97 cm<\/p>\n\n\n\nExplanation<\/h3>\n\n\n\n