Two circles have radii r1 r_1\,r1 and r2r_2r2, and the distance between their centres is ddd.
a.
State the condition for the circles to touch externally.
[1]
b.
State the condition for the circles to touch internally.
[1]
Markscheme
1.3.4 Coordinate geometry in the (x, y) plane Questions
8 exam-style questions on WJEC A Level Maths 1.3.4 Coordinate geometry in the (x, y) plane. Each one has a worked solution and a mark scheme showing where the marks go.