Matthew is 7 years older then twice the age of his sister, if matthew is 13, how old is his sister

Parks is wearing several rubber bracelets one third of the bracelets are tie-dye 1/6 are blue and 1/3 of the remainder are camouflage if parks wears 2 camouflage bracelets how many bracelets does he have on

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle