How do I graph cardioid #r = 2 + 2cosθ#? Precalculus Polar Coordinates Cardioid Curves 1 Answer bp Jun 25, 2015 Use a Polar graph and plot for #theta# equal to 0,#pi/3, pi/2, pi, (2pi)/3, (4pi)/3, (3pi)/2 and 2pi# and draw a symmetrical curve. Answer link Related questions What is a cardioid curve? What is the graph of # r = a ± a cos θ#? What is the graph of #r = 2a(1 + cosθ)#? What is the graph of the Cartesian equation #(x^2 + y^2 - 2ax)^2 = 4a^2(x^2 + y^2)#? What is the graph of #r = sin^2(π/8 - θ/4)#? What is the graph of the Cartesian equation #y = 0.75 x^(2/3) +- sqrt(1 - x^2)#? How do I find the area inside a cardioid? How do I find the area inside the cardioid #r=1+costheta#? How do I find the length of the cardioid #r=1+costheta#? How do I find the length of the cardioid #r=1+sintheta#? See all questions in Cardioid Curves Impact of this question 4940 views around the world You can reuse this answer Creative Commons License