Results on ${\varphi }_2$ from Belle

We present a summary of measurements sensitive to the CKM angle ${\varphi }_2$, performed by the Belle experiment using the final data sample of $772 \times 10^{6}$ $B\bar{B}$ pairs produced at the $\mathrm{{\rm Y}}(4S)$ resonance at the KEK asymmetric $e^{+}{e}^{-}$ collider. We discuss $CP$ asymmetries from the decay $B^{0} \rightarrow \pi^{+} \pi^{-}$ and briefly mention a preliminary measurement of the branching fraction of $B\to {\pi }^0{\pi }^0$ decays. Furthermore the measurement of the branching fraction of $B^0\to {\rho }^0{\rho }^0$ decays and fraction of longitudinal polarization in this decay is presented. We use the results to constrain ${\varphi }_2$ with isospin analyses in the $B\rightarrow \pi\pi$and$B\rightarrow\rho\rho$ systems.