The compound shown is 1,2-dimethylcyclopropane with both methyl groups on the same face of the ring. It is

This is cis-1,2-dimethylcyclopropane, (1R,2S). C1 and C2 are stereocentres, but the molecule has a plane of symmetry that contains C3 and the two $\mathrm{CH}{}_2$ hydrogens and bisects the C1-C2 bond. Reflection through this plane exchanges the two equivalent $\mathrm{CH}(\mathrm{CH}{}_3)$ groups, so the molecule is superimposable on its mirror image. It is a meso compound and achiral.