(1 point) Use Heron's formula to find the area of the triangle with sides \( a=11.8 \) feet, \( b=13.2 \) feet, and \( c=18.6 \) feet. Round answers to the nearest hundredth. Area \( =\pi .36 \) help (numbers)

3 Una circonferenza è lunga \( 47,1 \mathrm{~cm} \). Colcola la lunghezza del suo raggio.

Educasione civica Una tovaglia rotonda ha il diametro di 180 cm . Calcola il costo del pizzo che serve per orlarla, sapendo che viene venduto a 7,50 euro al metro.

Question 4 of 10 Only regular polydons with an odd number of sides are symmetrical. A. True B. False

Question 9 of 10 If a shape is a regular hexagon with six sides, which of the following must be true? Check all that apply. \( \square \) A. It has reflectional symmetry. \( \square \) B. It has six lines of symmetry. \( \square \) C. It has an unlimited number of lines of symmetry. \( \square \) D. It has exactly one line of symmetry.

How many lines of symmetry does a regular octagon have?