The width of the rectangle is 3 cm and the length is 4 times greater. Find the perimeter and area of the rectangle.

For a figurative representation, you can build a rectangle (a quadrilateral with all angles straight).

1) What is the length of a rectangle if it is 4 times the width of this quadrangle (3cm)?

3 * 4 = 12 (cm) the length of the rectangle.

2) What is the perimeter of a rectangle if it is 12 cm long and 3 cm wide? P = (a + b) * 2; P = a * 2 + b * 2; P = a + a + b + b.

(12 + 3) * 2 = 30 (cm) perimeter of the rectangle.

3) What is the area of the rectangle? S = a * b.

12 * 3 = 36 (cm ^ 2) area of the rectangle.

Answer: 30 centimeters perimeter and 36 square centimeters rectangle area.




One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.

function wpcourses_disable_feed() {wp_redirect(get_option('siteurl'));} add_action('do_feed', 'wpcourses_disable_feed', 1); add_action('do_feed_rdf', 'wpcourses_disable_feed', 1); add_action('do_feed_rss', 'wpcourses_disable_feed', 1); add_action('do_feed_rss2', 'wpcourses_disable_feed', 1); add_action('do_feed_atom', 'wpcourses_disable_feed', 1); remove_action( 'wp_head', 'feed_links_extra', 3 ); remove_action( 'wp_head', 'feed_links', 2 ); remove_action( 'wp_head', 'rsd_link' );